Panasonic MS KX-FT981, MS KX-FT987LA-B Schematic

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Page 1

ORDER NO. KMF0806165CE

Personal Facsimile / Facsimile with Digital Answering System

Model No. KX-FT981LA-B

KX-FT987LA-B

Black version (for Latin America)

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KX-FT981LA-B / KX-FT987LA-B

TABLE OF CONTENTS

PAG E PAG E

1 Safety Precautions -----------------------------------------------3

1.1. For Service Technicians----------------------------------3

1.2. AC Caution---------------------------------------------------3

1.3. Personal Safety Precautions ----------------------------4

1.4. Service Precautions ---------------------------------------5

2Warning--------------------------------------------------------------6

2.1. About Lead Free Solder (PbF: Pb free) --------------6

2.2. Insulation Resistance Test ------------------------------- 7

2.3. Battery Caution ---------------------------------------------7

2.4. Discarding of P. C. Board --------------------------------7

3 Specifications ------------------------------------------------------8 4 General/Introduction---------------------------------------------9

4.1. Optional Accessories--------------------------------------9

4.2. Translation Lists --------------------------------------------9

5Features------------------------------------------------------------ 10 6 Technical Descriptions---------------------------------------- 11

6.1. Connection Diagram------------------------------------- 11

6.2. General Block --------------------------------------------- 12

6.3. Control Section ------------------------------------------- 14

6.4. Facsimile Section ---------------------------------------- 20

6.5. Sensors and Switches ---------------------------------- 26

6.6. Modem Section ------------------------------------------- 30

6.7. NCU Section----------------------------------------------- 37

6.8. ITS (Integrated Telephone System) and Monitor Section -------------------------------------------41

6.9. TAM Interface Section (KX-FT981 only)------------41

6.10. ATAS (Automatic Telephone Answering System) Section (KX-FT987 only) ------------------- 42

6.11. Operation Board Section ------------------------------- 43

6.12. LCD Section ----------------------------------------------- 44

6.13. Power Supply Board Section-------------------------- 45

7 Location of Controls and Components------------------ 48

7.1. Overview --------------------------------------------------- 48

7.2. Control Panel---------------------------------------------- 48

8 Installation Instructions---------------------------------------49

8.1. Installation Space ----------------------------------------49

8.2. Connections ----------------------------------------------- 50

8.3. Installing the Recording Paper------------------------ 50

8.4. Documents the Unit can Send ------------------------ 51

9 Operating Instructions ---------------------------------------- 52

9.1. Setting Logo ----------------------------------------------- 52

10 Test Mode----------------------------------------------------------54

10.1. DTMF Single Tone Transmit Selection ------------- 56

10.2. Button Code Table --------------------------------------- 56

10.3. Print Test Pattern----------------------------------------- 57

11 Service Mode ----------------------------------------------------- 58

11.1. Programing and Lists------------------------------------ 58

11.2. The Example of the Printed List ---------------------- 62

12 Troubleshooting Guide---------------------------------------- 67

12.1. Troubleshooting Summary----------------------------- 67

12.2. Error Messages-Display -------------------------------- 68

12.3. Error Messages-Report--------------------------------- 70

12.4. Remote Programming----------------------------------- 92

12.5. Troubleshooting Details -------------------------------- 95

13 Service Fixture & Tools ------------------------------------- 127 14 Disassembly and Assembly Instructions ------------- 128

14.1. Upper Cabinet Section-------------------------------- 129

14.2. Lower Cabinet Section-------------------------------- 132

14.3. Operation Panel Section -----------------------------135

14.4. Installation Position of the Lead Wires ------------138

15 Maintenance-----------------------------------------------------140

15.1. Maintenance Items and Component Locations -140

15.2. Gear Section --------------------------------------------- 142

15.3. Jams -------------------------------------------------------148

15.4. Cleaning---------------------------------------------------149

16 Miscellaneous --------------------------------------------------151

16.1. Terminal Guide of ICs Transistors and Diodes-- 151

16.2. How to Replace the Flat Package IC --------------153

16.3. Test Chart ------------------------------------------------- 154

17 Schematic Diagram ------------------------------------------- 156

17.1. Digital Board (PCB1): KX-FT981 -------------------156

17.2. Digital Board (PCB1): KX-FT987 -------------------160

17.3. Analog Board (PCB2) ---------------------------------164

17.4. Operation Board (PCB3/PCB203)------------------166

17.5. Power Supply Board (PCB4) ------------------------167

18 Printed Circuit Board-----------------------------------------169

18.1. Digital Board (PCB1)-----------------------------------169

18.2. Analog Board (PCB2) ---------------------------------171

18.3. Operation Board (PCB3/PCB203)------------------173

18.4. Power Supply Board (PCB4) ------------------------175

19 Appendix Information of Schematic Diagram ------- 176 20 Exploded View and Replacement Parts List---------- 177

20.1. Cabinet and Mechanical Parts Location ----------177

20.2. Replacement Parts List -------------------------------185

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KX-FT981LA-B / KX-FT987LA-B

1 Safety Precautions

1. Before servicing, unplug the AC power cord to prevent an electric shock.

2. When replacing parts, use only the manufacturer's recommended components.

3. Check the condition of the power cord. Replace if wear or damage is evident.

4. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.

5. Before returning the serviced equipment to the customer, be sure to perform the following insulation resistance test to prevent the customer from being exposed to shock hazards.

1.1. For Service Technicians

• Repair service shall be provided in accordance with repair technology information such as service manual so as to prevent fires, injury or electric shock, which can be caused by improper repair work.

1. When repair services are provided, neither the products nor their parts or members shall be remodeled.

2. If a lead wire assembly is supplied as a repair part, the lead wire assembly shall be replaced.

3. FASTON terminals shall be plugged straight in and unplugged straight.

• ICs and LSIs are vulnerable to static electricity.

When repairing, the following precautions will help prevent recurring malfunctions.

1. Cover plastic parts boxes with aluminum foil.

2. Ground the soldering irons.

3. Use a conductive mat on worktable.

4. Do not grasp IC or LSI pins with bare fingers.

1.2. AC Caution

For safety, before closing the lower cabinet, please make sure of the following precautions.

1. The earth lead is fixed with the screw.

2. The AC lead is connected properly to power supply unit.

3. Wrap the earth lead around the core 3 times.

4. Wrap the AC lead around the core 2 times.

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KX-FT981LA-B / KX-FT987LA-B

1.3. Personal Safety Precautions

1.3.1. Moving Sections of the Unit

Be careful not to let your hair, clothes, fingers, accessories, etc., become caught in any moving sections of the unit. The moving sections of the unit are the rollers and a gear. There is a separation roller and a document feed roller which are rotated by the document feed motor. A gear rotates the two rollers. Be careful not to touch them with your hands, especially when the unit is operating.

1.3.2. Live Electrical Sections

All the electrical sections of the unit supplied with AC power by the AC power cord are live. Never disassemble the unit for service with the AC power supply plugged in.

CAUTION:

AC voltage is supplied to the primary side of the power supply unit. Therefore, always unplug the AC power cord before disassembling for service.

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KX-FT981LA-B / KX-FT987LA-B

1.4. Service Precautions

1.4.1. Precautions to Prevent Damage from Static Electricity

Electrical charges accumulate on a person. For instance, clothes rubbing together can damage electric elements or change their electrical characteristics. In order to prevent static electricity, touch a metallic part that is grounded to release the static electricity. Never touch the electrical sections such as the power supply unit, etc.

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KX-FT981LA-B / KX-FT987LA-B

2Warning

2.1. About Lead Free Solder (PbF: Pb free)

Note:

In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder that contains lead.

We will use PbF solder when discussing the lead free solder used in our manufacturing process which is made from Tin, (Sn), Silver, (Ag), and Copper, (Cu).

This model, and others like it, manufactured using lead free solder will have PbF stamped on the PCB. For service and repair work we suggest using the same type of solder although, with some precautions, standard Pb solder can also be used.

Caution

PbF solder has a melting point that is 50° ~ 70° F, ( 30° ~ 40°C) higher than Pb solder. Please use a soldering iron with temperature

control and adjust it to 700° ± 20° F, (3 7 0° ± 10°C). In case of using high temperature soldering iron, please be careful not to heat

too long. PbF solder will tend to splash if it is heated much higher than its melting point, approximately 1100°F, (6 00 °C). If you must use Pb solder on a PCB manufactured using PbF solder, remove as much of the original PbF solder as possible and be

sure that any remaining is melted prior to applying the Pb solder. When applying PbF solder to double layered boards, please check the component side for excess which may flow onto the opposite

side (See figure, below).

2.1.1. Suggested PBF Solder

There are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper, (Sn+Ag+Cu), you can also use Tin and Copper, (Sn+Cu), or Tin, Zinc, and Bismuth, (Sn+Zn+Bi). Please check the manufacturer’s specific instructions for the melting points of their products and any precautions for using their product with other materials. The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3mm, 0.6mm and 1.0mm.

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KX-FT981LA-B / KX-FT987LA-B

2.2. Insulation Resistance Test

1. Unplug the power cord and short the two prongs of the plug with a jumper wire.

2. Turn on the power switch.

3. Measure the resistance value with an ohmmeter between the jumpered AC plug and each exposed metal cabinet part (screw heads, control shafts, bottom frame, etc.). Note: Some exposed parts may be isolated from the chassis by design. These will read infinity.

4. If the measurement is outside the specified limits, there is a possibility of a shock hazard.

2.3. Battery Caution

CAUTION

Danger of explosion if the battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer’s Instructions.

The lithium battery is a critical component (type No. CR2032). Please observe for the proper polarity and the exact location when replacing it and soldering the replacement lithium battery in.

2.4. Discarding of P. C. Board

When discarding P. C. Board, delete all personal information such as telephone directory and caller list or scrap P. C. Board.

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KX-FT981LA-B / KX-FT987LA-B

3 Specifications

Applicable Lines: Public Switched Telephone Network

Document Size: Max. 216 mm in width

Max. 600 mm in length

Effective Scanning Width: 208 mm

Recording Paper Size: 216 × max. 30 m roll

Effective Printing Width: 208 mm

Transmission Time

: Approx. 15 s/page (Original mode)

Scanning Density: Horizontal: 8 pels/mm

Vertical:

3.85 lines/mm - in standard resolution,

7.7 lines/mm - in fine/photo resolution,

15.4 lines/mm - in super fine resolution

Photo resolution: 64-level

Scanner Type: Contact Image Sensor

Printer Type: Thermal printing

Data Compression System: Modified Huffman (MH), Modified READ (MR)

Modem Speed: 9,600 / 7,200 / 4,800 / 2,400 bps; Automatic Fallback

Operating Environment: 5°C - 35°C, 20% - 80% RH (Relative Humidity)

Dimensions (H×W×D): Approx. height 121 mm × width 352 mm × depth 224 mm

Mass (Weight): KX-FT981: Approx. 2.7 kg

KX-FT987: Approx. 2.8 kg

Power Consumption: Standby: Approx. 1.2 W (KX-FT981)

Standby: Approx. 1.4 W (KX-FT987) Transmission: Approx. 13 W Reception: Approx. 30 W (When receiving a 20% black document) Copy: Approx. 35 W (When copying a 20% black document) Maximum: Approx. 120 W (When copying a 100% black document)

Power Supply: 120 V AC, 60 Hz

Fax Memory Capacity

Approx. 28 pages of memory reception (Based on the ITU-T No. 1 Test Chart in standard resolution, with original mode.)

Voice Memory Capacity (KX-FT987 only):

Approx. 12 minutes of recording time including greeting message when no documents are in memory.

Transmission speed depends upon the contents of the pages, resolution, telephone line conditions and capability of the other

party’s machine.

Transmission speed is based upon the ITU-T No. 1 Test Chart with original mode. If the capability of the other party’s machine is

inferior to your unit, the transmission time may be longer.

If an error occurs during fax reception, such as a paper jam or if the recording paper runs out, the fax and subsequent faxes will

be retained in memory.

Recording time may be reduced by the calling party’s background noise.

Note:

Design and specifications are subject to change without notice.

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KX-FT981LA-B / KX-FT987LA-B

4 General/Introduction

4.1. Optional Accessories

Model No. Item Specifications/Usage

KX-A106

Use only the included or specified recording paper. Using other recording paper may affect print quality and/or cause exces-

sive wear to the thermal head.

Standard thermal recording paper*

4.2. Translation Lists

4.2.1. Error Messages-Display

216 mm × 30 m roll, with 25 mm core

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KX-FT981LA-B / KX-FT987LA-B

4.2.2. Error Messages-Report

4.2.3. Other-Display

5Features

General

• LCD (Liquid Crystal Display) readout

• The display and reports will be in the selected language. (Spanish / Portuguese / English)

• Automatic Paper Cutter (KX-FT987 only)

Facsimile

• Document memory

• Automatic document feeder (10 sheets)

• 64-Level halftone resolution Standard/Fine/Photo/Super Fine

• Broadcast

Integrated Telephone System

• Phonebook function (100 names)

• One-Touch Dial (10 stations)

• Caller ID compatible

• Monitor (KX-FT981 only)

• Digital SP-Phone (KX-FT987 only)

Digital Answering System (KX-FT987 only)

• Voice Time/Day Stamp

• 12-Minutes recording time

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6 Technical Descriptions

6.1. Connection Diagram

KX-FT981LA-B / KX-FT987LA-B

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KX-FT981LA-B / KX-FT987LA-B

6.2. General Block

The following is an outline of each device IC on the digital board. (Refer to General Block Diagram (P.13).).

1. ASIC (IC1)

Composed mainly of an address decoder and a modem control. Controls the general FAX operations. Controls the operation panel I/F. Controls the thermal head I/F and CIS I/F. Performs the image processing. CPU and Real time clock Provides the reset pulse for each of the major ICs.

2. Flash ROM (IC2)

Contains all of the program instructions on the unit operations. This memory is used mainly for the parameter working in the storage area.

3. Dynamic RAM (IC4)

This memory is used mainly for the parameter working in the storage area.

4. MODEM (IC5)

Performs the modulation and the demodulation for FAX communication.

5. Read Section

CIS image sensor to read transmitted documents.

6. Motor Driver (IC7)

Drives the transmission motor and the reception motor.

7. Thermal Head

Contains heat-emitting elements for dot matrix image printing.

8. Sensor Section

Composed of a cover open, a document set switch, a document top switch, a paper sensor switch, a jam sensor switch, and a hook sensor switch.

9. Power Supply Board Switching Section

Supplies +6V and +24V to the unit.

10. Flash MEMORY (IC6) (KX-FT987 only) Voice Prompt (TAM) D/L (DownLoad) area.

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6.2.1. General Block Diagram

KX-FT981LA-B / KX-FT987LA-B

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KX-FT981LA-B / KX-FT987LA-B

6.3. Control Section

6.3.1. ASIC (IC1)

This custom IC is used for the general FAX operations.

1. CPU: This model uses a Z80 equivalent to the CPU operating at 24 MHz. Most of the peripheral functions are performed by custom-designed LSIs. Therefore, the CPU only works for processing the results.

2. RTC: Real Time Clock

3. DECODER: Decodes the address.

4. ROM/RAM I/F: Controls the SELECT signal of ROM or RAM and the bank switching.

5. CIS I/F: Controls the document reading.

Note:

This memory is incorporated into the ASIC (IC1) and used for the image processing.

6. IMAGE DATA RAM: This memory is programmed into the ASIC and uses 8 KB for the image processing.

7. THERMAL HEAD I/F: Transmits the recorded data to the thermal head.

8. MOTOR I/F: Controls the transmission motor which feeds the document. Controls the receiving motor which feeds the recording paper.

9. OPERATION PANEL I/F: Serial interface with Operation Panel.

10. I/O PORT: I/O Port Interface.

11. ANALOG UNIT: Electronic volume for the monitor. Sends beep tones, etc.

Descriptions of Pin Distribution (IC1)

NO. SIGNAL I/O POWER SUPPLIED

1 VSSA1 GND POWER SOURCE (ANALOG GND) 2 VDDA 3.3 3.3V POWER SOURCE (ANALOG +3.3V) 3 AIN1 A 3.3V CIS IMAGE SIGNAL INPUT (ATN1) 4 AIN2 A 3.3V THERMISTOR TEMPERATURE WATCH INPUT 5 AIN3 A 3.3V LINE VOLTAGE DETECTION SIGNAL INPUT (DCIN) 6 AMON A 3.3V ANALOG SIGNAL MONITOR TERMINAL 7 VSS1 GND POWER SOURCE (GND) 8 X32OUT O 3.3V/BATT RTC (32.768KHz) CONNECTION

9 X32IN I 3.3V/BATT RTC (32.768KHz) CONNECTION 10 VDD (3.3V / B) ----- POWER SOURCE (+3.3V/LITHIUM BATTERY) 11 XBACKEN I 3.3V/BATT BACKUP ENABLE 12 XRAMCS O 3.3V/BATT XRAMCS 13 VDD (3.3V / B) ----- POWER SOURCE(+3.3V / LITHIUM BATTERY) 14 VDD (2.5V/B) ----- POWER SOURCE (+2.5V / LITHIUM BATTERY) 15 FTG O 3.3V SH SIGNAL OUTPUT FOR CIS (FTG) 16 F1 O 3.3V 01 SIGNAL OUTPUT FOR CIS (F1) 17 F2/OP O 3.3V OUTPUT PORT (HEADON) 18 FR/OP O 3.3V OUTPUT PORT (MDMRST) 19 CPC I 3.3V INPUT PORT (BELL/CPC) 20 RVN I 3.3V INPUT PORT (PAPER) 21 IRDATXD I 3.3V INPUT PORT (JAM) 22 IRDARXD O 3.3V OUTPUT PORT (HSTX MUTE) 23 TXD/IOP I 3.3V TXD 24 RXD/IOP I/O 3.3V RXD 25 RTS/IOP I 3.3V RTS 26 CTS/IOP I/O 3.3V CTS 27 VDD (2.5V)1 ----- POWER SOURCE (+2.5V) 28 TONE1 A 3.3V TONE OUTPUT 29 TONE2 A 3.3V TONE OUTPUT 30 VOLUREF/VOLU1 A 3.3V ANALOG REF VOLTAGE 31 VOLUOUT/VOLU2 A 3.3V VOLUME OUTPUT 32 VOLUIN/VOLU3 A 3.3V VOLUME INPUT 33 XNMI I 3.3V HIGH FIXED 34 FMEMDO/IOP O 3.3V OUTPUT PORT (LED ON) 35 VDD (3.3V)1 ----- POWER SOURCE (+3.3V) 36 VSS2 GND POWER SOURCE (GND) 37 VSS3 GND POWER SOURCE (GND)

DESCRIPTION

VOLTAGE

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KX-FT981LA-B / KX-FT987LA-B

NO. SIGNAL I/O POWER SUPPLIED

DESCRIPTION

VOLTAGE 38 VDD (3.3V)2 ----- POWER SOURCE (+3.3V) 39 MIDAT/IOP I/O 3.3V PORT (TONE1EN) 40 MICLK/IOP O 3.3V OUTPUT PORT (MDMTXEN) 41 MILAT/IOP I/O 3.3V PORT (HSRXEN) 42 20KOSC/IOP O 3.3V OUTPUT PORT (PSHORT/ACK_EN) 43 XWAIT I 3.3V INPUT PORT (HOOK) 44 XHSTRD/IOP I 3.3V INPUT PORT (TEST) 45 XHSTWR/IOP O 3.3V OUTPUT PORT (DCN) 46 XOPRBE O 3.3V OUTPUT PORT (MFCS) 47 ADR15 O 3.3V CPU ADDRESS BUS 15 (NOT USED) 48 ADR14 O 3.3V CPU ADDRESS BUS 14 (NOT USED) 49 ADR13 O 3.3V CPU ADDRESS BUS 13 (NOT USED) 50 VDD (2.5V)2 ----- POWER SOURCE (+2.5V) 51 XOUT O 3.3V SYSTEM CLOCK (24MHz) 52 XIN I 3.3V SYSTEM CLOCK (24MHz) 53 VSS4 GND POWER SOURCE (GND) 54 VDD (3.3V)3 ----- POWER SOURCE (+3.3V) 55 XTEST O 3.3V 24MHz CLOCK 56 TEST1 I 3.3V HIGH FIXED 57 TEST2 I 3.3V HIGH FIXED 58 TEST3 I 3.3V HIGH FIXED 59 TEST4 I 3.3V HIGH FIXED 60 XMDMINT I 3.3V MODEM INTERRUPT 61 XMDMCS O 3.3V MODEM CHIP SELECT 62 XRAS/IOP O 3.3V DRAM ROW ADDRESS STROBE (RAS) 63 XCAS1/IOP O 3.3V DRAM COLUMN ADDRESS STROBE (CAS) 64 XCAS2/IOP I 3.3V PORT (SPMUTE) 65 XRESCS2 O 3.3V FLASH CHIP SELECT (XRESCS2) 66 DB3 I/O 3.3V CPU DATA BUS 3 67 DB2 I/O 3.3V CPU DATA BUS 2 68 DB4 I/O 3.3V CPU DATA BUS 4 69 DB1 I/O 3.3V CPU DATA BUS 1 70 DB5 I/O 3.3V CPU DATA BUS 5 71 VDD (3.3V)4 ----- POWER SOURCE (+3.3V) 72 VSS5 GND POWER SOURCE (GND) 73 VSS6 GND POWER SOURCE (GND) 74 VDD (3.3V)5 ----- POWER SOURCE (+3.3V) 75 DB0 I/O 3.3V CPU DATA BUS 0 76 DB6 I/O 3.3V CPU DATA BUS 6 77 DB7 I/O 3.3V CPU DATA BUS 7 78 XROMCS O 3.3V FLASH (IC2) CHIP SELECT 79 XRD O 3.3V CPU RD 80 XWR O 3.3V CPU WR 81 ADR0 O 3.3V CPU ADDRESS BUS 0 82 ADR1 O 3.3V CPU ADDRESS BUS 1 83 ADR2 O 3.3V CPU ADDRESS BUS 2 84 ADR3 O 3.3V CPU ADDRESS BUS 3 85 ADR4 O 3.3V CPU ADDRESS BUS 4 86 ADR5 O 3.3V CPU ADDRESS BUS 5 87 VSS7 GND POWER SOURCE (GND) 88 VDD (2.5V)3 ----- POWER SOURCE (+2.5V) 89 ADR6 O 3.3V CPU ADDRESS BUS 6 90 ADR7 O 3.3V CPU ADDRESS BUS 7 91 ADR8 O 3.3V CPU ADDRESS BUS 8 92 ADR9 O 3.3V CPU ADDRESS 9 93 ADR10 O 3.3V CPU ADDRESS 10 94 ADR11 O 3.3V CPU ADDRESS 11 95 ADR12 O 3.3V CPU ADDRESS 12 96 RBA0 O 3.3V ROM/RAM BANK ADDRESS 0 97 RBA1 O 3.3V ROM/RAM BANK ADDRESS 1 98 RBA2 O 3.3V ROM/RAM BANK ADDRESS 2 99 RBA3 O 3.3V ROM/RAM BANK ADDRESS 3

100 RBA4 O 3.3V ROM/RAM BANK ADDRESS 4 101 RBA5 O 3.3V ROM/RAM BANK ADDRESS 5 102 RBA6/IOP O 3.3V OUTPUT PORT (NC) 103 STB1 O 3.3V STROBE SIGNAL OUTPUT TO THERMAL HEAD

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KX-FT981LA-B / KX-FT987LA-B

NO. SIGNAL I/O POWER SUPPLIED

VOLTAGE 104 STB2 O 3.3V STROBE SIGNAL OUTPUT TO THERMAL HEAD 105 STB3 O 3.3V OUTPUT PORT (NC) 106 XRESET I 3.3V RESET INPUT 107 VDD (3.3V)6 ----- POWER SOURCE (+3.3V) 108 VSS8 GND POWER SOURCE (GND) 109 VSS9 GND POWER SOURCE (GND)

110 VDD (3.3V)7 ----- POWER SOURCE (+3.3V) 111 XORESET O 3.3V NOT USED 112 VDD(5V) ----- POWER SOURCE (+5V) 113 VSS10 GND POWER SOURCE (GND) 114 XRESETI I 3.3V RESET INPUT 115 XWDERR O 3.3V WATCHED ERROR OUTPUT SIGNAL 116 THDAT O 3.3V RECORDED IMAGE OUTPUT (THDAT) 117 THCLK O 3.3V CLOCK OUTPUT FOR DATA TRANSFER (THCLK) 118 THLAT O 3.3V PULSE OUTPUT FOR DATA LATCH (THLAT)

119 STBNP I 3.3V INPUT PORT (MOT-POS) 120 RM0/IOP O 3.3V MOTOR A PHASE 121 RM1/IOP O 3.3V MOTOR B PHASE 122 RM2/IOP O 3.3V MOTOR /A PHASE 123 RM3/IOP O 3.3V MOTOR /B PHASE 124 RXE/IOP O 3.3V MOTOR ENABLE 125 TMO O 3.3V OUTPUT PORT (R1) 126 VDD (2.5V)4 ----- POWER SOURCE (+2.5V) 127 VSS11 GND POWER SOURCE (GND) 128 TM1/IOP O 3.3V OUTPUT PORT (R2) 129 TM2/IOP O 3.3V OUTPUT PORT (CISON) 130 TM3/IOP O 3.3V OUTPUT PORT (RLY) 131 TXE/IOP I 3.3V INPUT PORT (CUT_POS) 132 KSTART O 3.3V OPERATION PANEL CONTROL 133 KLATCH O 3.3V OPERATION PANEL CONTROL 134 KSCLK O 3.3V OPERATION PANEL CONTROL 135 KTXD O 3.3V OPERATION PANEL CONTROL 136 KRXD I 3.3V OPERATION PANEL CONTROL 137 FMEMCLK/IOP O 3.3V OUTPUT PORT (OPRESET) 138 FMEMDI/IOP O 3.3V OUTPUT PORT (NC) 139 ADSEL1 O 3.3V CHANNEL SELECT SIGNAL FOR AIN2 140 VDDA (2.5V) 2.5V POWER SOURCE (ANALOG +2.5V) 141 VREFB A 3.3V A/D CONVERTER'S ZERO STANDARD VOLTAGE

OUTPUT 142 VCL A 3.3V ANALOG PART STANDARD VOLTAGE SIGNAL 143 VREFT A 3.3V A/D CONVERTER'S FULL SCALE VOLTAGE OUTPUT 144 VSSA2 GND POWER SOURCE (ANALOG GND)

DESCRIPTION

Connection to operation reset circuit

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KX-FT981LA-B / KX-FT987LA-B

6.3.2. Flash Memory (IC2)

This 512KB ROM (FLASH MEMORY) carries a common area of 32KB and bank areas which each have 8KB (BK4~BK63). The addresses from 0000H to 7FFFH are for the common area and from 8000H to 9FFFH are for the bank areas.

6.3.3. Dynamic RAM (IC4)

The DRAM serves as CPU and receives memory. The address is F200H~F3FFH (DRAM access window 1) and F600H~F7FFH (DRAM access window 2).

6.3.4. Reset Circuit (Watch dog timer)

The output signal (reset) from pin 4 of the voltage detect IC (IC3) is input to the ASIC (IC1) 114 pin.

1. During a momentary power interruption, a positive reset pulse of 50~70 msec is generated and the system is reset completely.

2. The watch dog timer, built-in the ASIC (IC1), is initialized by the CPU about every 1.5 ms. When a watch dog error occurs, pin 115 of the ASIC (IC1) becomes low level. The terminal of the 'WDERR' signal is connected to the reset line, so the 'WDERR' signal works as the reset signal.

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KX-FT981LA-B / KX-FT987LA-B

6.3.5. RTC Back up Circuit

1. Function This unit has a lithium battery (BAT1) which works for the Real Time Clock (RTC, Integrated into ASIC:IC1). The RTC continues functioning, even when the power switch is OFF, backed up by a lithium battery.

2. Circuit Operation When the power is turned ON, power is supplied to RTC (IC1). At this time, the voltage at pin 14 of RTC (IC1) is +3.3V. When the power is turned OFF, the battery supplies the power to RTC through JS1, R30, D14. At that time, the voltage at pin 14 of IC1 are about +2.5V. When the power is OFF and the +5V and +3.3V voltages decrease, the LOW is input to pin 114 of IC1. Pin 111 of IC1 outputs the reset signals. Pin 11 of IC1 become low, then RTC (IC1) go into the back up mode, when the power consumption is lower.

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KX-FT981LA-B / KX-FT987LA-B

6.3.6. Supervision Circuit for the Thermal Head Temperature

1. Function The thermistor changes the resistor according to the temperature and uses the thermistor's characteristics. The output of pin 139 of IC1 becomes a low level. Then when it becomes a high level, it triggers point A. In point C, according to the voltage output time, the thermal head's temperature is detected. After the thermal head temperature is converted to voltage in B, it is then changed to digital data in the A/D converter inside IC1. The CPU decides the strobe width of the thermal head according to this value. Therefore, this circuit can keep the thermal head at an even temperature in order to stabilize the printing density and prevent the head from being overheated.

REFERENCE:

Thermal Head (P.22)

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KX-FT981LA-B / KX-FT987LA-B

6.4. Facsimile Section

6.4.1. Image Data Flow During Facsimile Operation

Copy (Fine, Super-Fine, Photo)

1. Line information is read by CIS (to be used as the reference white level) via route (1), and is input to IC1. Refer to Block Diagram (P.21)

2. In IC1, the data is adjusted to a suitable level for A/D conversion in the Analog Signal Processing Section, and via route (2) it is input to A/D conversion (8 bit). After finishing A/D conversion, the data is input to the Image Processing Section via route (3). Then via route (4) and route (5), it is stored in RAM as shading data.

3. The draft’s information that is read by CIS is input to IC1 via route (1). After it is adjusted to a suitable level for A/D conversion via route (2), the draft’s information is converted to A/D (8 bit), and it is input to the Image Processing Section. The other side, the shading data which flows from RAM via route (6) and route (7), is input to the Image Processing Section. After finishing the draft’s information image processing, white is regarded as "0" and black is regarded as "1". Then via routes (4) and (5), they are stored in RAM.

4. The white/black data stored as above via routes (6) and (8) is input to the P/S converter. The white/black data converted to serial data in the P/S converter is input to the Thermal Head via route (9) and is printed out on recording paper.

Note:

Fine: Reads 3.85 lines/mm Super Fine: Reads 7.7 lines/mm Photo: Reads 15.4 lines/mm

Transmission

1. Same processing as Copy items 1 - 3.

2. The data stored in the RAM of IC1 is output from IC1 via routes (6) and (10), and is stored in the system bus. Via route (11), it is stored in the communication buffer inside DRAM (IC4).

3. While retrieving data stored in the communication buffer synchronous with the modem, the CPU (inside IC1) inputs the data to the modem along route (12), where it is converted to serial analogue data and forwarded over the telephone lines via the NCU Section.

Reception

1. The serial analog image data is received over the telephone lines and input to the modem via the NCU section, where it is demodulated to parallel digital data. Then the CPU (IC1) stores the data in the communication buffer DRAM (IC4) along route (11).

2. The data stored in DRAM (IC4) is decoded by the CPU (IC1) via route (12), and is stored in RAM via routes (13) and (5).

3. Same processing as Copy item 4.

Page 21

6.4.2. Block Diagram

KX-FT981LA-B / KX-FT987LA-B

Page 22

KX-FT981LA-B / KX-FT987LA-B

6.4.3. Thermal Head

1. Function This unit utilizes state of the art thermal printer technology. The recording paper (roll paper) is chemically processed. When the thermal head contacts this paper it emits heat momentarily, and black dots (appearing like points) are printed on the paper. If this continues, letters and/or diagrams appear, and the original document is reproduced.

2. Circuit Operation There are 27 driver ICs aligned horizontally on the thermal head and each one of these ICs can drive 64 heat emitting registers. This means that one line is at a density of 64×27=1728 dots=(8 dots/mm). White/Black (white=0, black=1) data in one line increments is synchronized at IC1 pin 117 (THCLK), and sent from IC1 pin 116 (THDAT) to the shift register of the ICs. The shift registers of the 27 ICs are connected in series, and upon the shift of dot increment 1728, all the shift registers become filled with data, and a latch pulse is emitted to each IC from IC1 pin 118 (THLAT).With this latch pulse, all the contents of the shift registers are latched to the latch registers. Thereafter, through the addition of strobes from the IC1 pins (103 - 104) only black dot locations (=1) among latched data activates the driver, and the current passes to heat the emitting body causing heat emission. Here, the two line strobes, STB1 and STB2, impress at intervals of 9.216 msec, as required for one-line printout. The sequence is shown on the next page. [Moreover, for the strobe width, the thermistor value inside the thermal head is detected according to IC1 pin 4. Depending on that value, the strobe width is recorded in FLASH (IC2). Accordingly, the strobe width is determined. When the thermal head is not used, the IC1 (17, HEADON) becomes low, Q6 turns OFF, Q7 turns OFF, and the +24 V power supply for the thermal head driver is not impressed to protect the IC.

Page 23

KX-FT981LA-B / KX-FT987LA-B

Page 24

KX-FT981LA-B / KX-FT987LA-B

6.4.4. Scanning Block

The scanning block of this device consists of a control circuit and a contact image sensor made up of a celfoc lens array, a light source, and photoelectric conversion elements.

When an original document is inserted and the start button pressed, pin 129 of IC1 goes to a low level and the transistor Q14 turns on.This applies voltage to the light source to light it. The contact image sensor is driven by each of the FTG-F1 signals output from IC1, and the original image illuminated by the light source undergoes photoelectric conversion to output an analogue image signal (AIN). The analogue image signal is input to the system ASIC on AIN1 (pin 3 of IC1) and converted into 8-bit data by the A/D converter inside IC1. Then this signal undergoes digital processing in order to obtain a high-quality image.

Page 25

KX-FT981LA-B / KX-FT987LA-B

6.4.5. Stepping Motor Drive Circuit

1. Function One individual stepping motor is used for transmission and reception. It feeds the document or recording paper synchronized for reading or printing.

2. Circuit Operation During motor drive, ASIC IC1 pin 124 becomes a high level, and Q2 and Q1 go ON as a result. +24 V is supplied tothe motor coil. Stepping pulses are output from ASIC IC1, causing driver IC7 to go ON. The motor coil is energized sequentially in 2 phase increments or 1-2 phase increments, which causes a 1-step rotation. A 1-step rotation is 0.13mm of recording paper or document paper. The timing chart is below.

Stepping Motor Phase Pattern

Function Mode Phase Pattern Speed

Copy Fine/Photo 1-2 432 pps

Super Fine 1-2 216 pps

FAX STD 2 432 pps

Fine/Photo 1-2 432 pps

Super Fine 1-2 216 pps

——— Paper Feed 2 432 pps

When the motor is OFF, ASIC IC1 pin 124 becomes a low level and Q2 and Q1 also turns OFF. Instead of +24V, +5V is supplied through D11 so that the motor is held in place.

Page 26

KX-FT981LA-B / KX-FT987LA-B

6.5. Sensors and Switches

All of the sensors and switches are shown below.

Sensor Circuit

Location

DIGITAL CN5 Motor Position Sensor [CALL SERVICE]

ANALOG SW101 Cover Open / Paper Sensor [COVER OPEN] and [CHECK PAPER]

Operation Panel SW338 Document Top Sensor [REMOVE DOCUMENT]

Sensor Sensor or Switch Name Error Message (*1)

CN6 Cutter Position Sensor

SW102 Hook Sensor ————

SW103 JAM Sensor [PAPER JAMED]

SW339 Document Set Sensor [CHECK DOCUMENT]

Note:

• SEE Test Mode (P.54) for Sensor Check (#815).

• (*1) Refer to Translation Lists (P.9) for display.

[PAPER JAMED]

(KX-FT987 only)

Page 27

6.5.1. Motor Position Sensor

This sensor is a detection switch for recording the position of the CAM.

Signal (IC1-119 pin) Home position Low level Other High level

6.5.2. Cutter Position Sensor (KX-FT987 only)

KX-FT981LA-B / KX-FT987LA-B

Signal (IC1-131 pin) Home position Low level Other High level

6.5.3. Cover Open / Paper Sensor (SW101)

When the recording paper is loaded on the print head and the cover is closed, the paper sensor SW turns ON, and the input signal of IC1-20 pin becomes a low level. Usually, the SW turns OFF, and the input signal of IC1-20 pin becomes a high level.

Sensor Signal (IC1-20 pin) Set recording paper and cover is closed ON Low level No recording paper or cover is open OFF High level

Page 28

KX-FT981LA-B / KX-FT987LA-B

6.5.4. Hook Sensor (SW102)

When the handset is lifted, the switch turns ON, and the signal at pin 43 of IC1 becomes low. When the handset is returned, the switch turns OFF, and the signal at pin 43 of IC1 becomes high.

Sensor SW Signal (IC1-43 pin) ON-Hook OFF High level OFF-Hook ON Low level

6.5.5. Jam Sensor (SW103)

The JAM sensor is a detection switch for determining whether the recording paper edge is in the correct position or not. If the recording paper cannot be detected correctly at the JAM sensor position even when recording paper is present, then JAM is displayed. If the recording paper is at the sensor position, then the switch turns on the IC1-21 pin switches to a high level.

Signal (IC1-21 pin) Paper Low level No paper High level

Page 29

KX-FT981LA-B / KX-FT987LA-B

6.5.6. Document Top Sensor (SW338)

When a document is brought to the read position, the SW becomes ON, and the input signal of IC301-5 pin (Operation Board) becomes a low level. When there is no document at the read position, the SW becomes OFF, and the input signal of IC301-5 pin (Operation Board) becomes a high level.

Sensor SW Signal (IC301-5 pin) Out of the Read Position OFF High level At the Read Position ON Low level

6.5.7. Document Set Sensor (SW339)

When a document is set, the SW becomes ON, and input signal of IC301-6 pin (Operation Board) becomes a low level. When there is no document, the SW becomes OFF, and the input signal of IC301-6 pin (Operation Board) becomes a high level.

Sensor SW Signal (IC301-6 pin) No document OFF High level Set document ON Low level

Page 30

KX-FT981LA-B / KX-FT987LA-B

6.6. Modem Section

6.6.1. Function

The unit uses a 1 chip modem (IC5) that serves as an interface between the control section for FAX transmission and reception and the telephone line. During a transmitting operation, the digital image signals are modulated and sent to the telephone line. During a receiving operation, the analogue image signals which are received via the telephone line are demodulated and converted into digital image signals. The communication format and procedures for FAX communication are standardized by ITU-T. This 1 chip modem (IC5) has hardware which sends and detects all of the necessary signals for FAX communication (DTMF). It can be controlled by writing commands from the CPU (IC1: inside ASIC) to the register in the modem (IC5). This modem (IC5) also sends DTMF signals, generates a call tone (from the speaker), and detects a busy tone and dial tones.

Overview of Facsimile Communication Procedures (ITU-T Recommendation):

1. ON CCITT (International Telegraph and Telephone Consultative Committee) The No. XIV Group of CCITT, one of the four permanent organizations of the International Telecommunications Union (ITU), investigates and make recommendations on international standards for facsimiles.

2. Definition of Each Group

• Group I (G1) Official A-4 size documents without using formats which reduce the band width of a signal are sent over telephone lines.Determined in 1968. Transmission for about 6 minutes at a scanning line density of 3.85 lines/mm.

• Group II (G2) Using reduction technology in the modulation/demodulation format, an A-4 size document is sent at an official scanning line density of 3.85 lines/mm for about 3 minutes. Methods to suppress redundancy are not used. Determined in 1976.

• Group III (G3) Method of suppressing redundancy in the image signal prior to modulation is used. An A-4 size document is sent within about one minute. Determined in 1980.

• Group IV (G4) Transmission is via the data network. A method is provided for suppressing redundancy in signals prior to transmission, and error-free reception of transmission is possible. The scope of these facsimile applications is not limited simply to transmission of written statements. Through symbiotic linkages with other communication methods, it can be expected to expand to include integrated services.

Page 31

KX-FT981LA-B / KX-FT987LA-B

3. Facsimile Call Time Series As shown in the following diagram, the facsimile call time series is divided into five phases.

Phase A: Call setting Call setting can be manual/automatic. Phase B: Pre-message procedure Phase B is a pre-processing procedure and sequence for confirming the status of the terminal, transmission route, etc., and for terminal control. It implements terminal preparation status, determines and displays terminal constants, confirms synchronization status, etc. and prepares for transmission of facsimile messages. Phase C: Message transmission Phase C is the procedure for the transmitting facsimile messages. Phase D: Post message procedure Phase D is the procedure for confirming that the message is completed and received. For continuous transmission, phase B or phase C is repeated for transmission. Phase E: Call retrieval Phase E is the procedure for call retrieval, that is for circuit disconnection.

4. Concerning Transmission Time

Transmission Time

= Control Time + Image Transmission Time + Hold Time

Transmission time consists of the following.

Control time:

This is time at the start of transmission when the functions at the sending and receiving sides are confirmed, the transmission mode is established, and transmission and reception are synchronized.

Image transmission time:

This is the time required for the transmission of document contents (image data). In general, this time is recorded in the catalog, etc.

Hold time:

This is the time required after the document contents have been sent to confirm that the document was actually sent, and to check for telephone reservations and/or the existence of continuous transmission.

5. Facsimile Standards

Telephone Network Facsimile

Item Connection Control Mode Telephone Network Signal Mode Terminal Control Mode T. 30 Binary Facsimile Signal Format Digital Modulation Mode PSK (V. 27 ter) or QAM (V. 29) Transmission Speed 300 bps (Control Signal)

2400, 4800, 7200, 9600 bps (FAX Signal) Redundancy Compression Process (Coding Mode) Resolution Main Scan: 8 pel/mm

Line Synchronization Signal EOL Signal 1 Line Transmission Time [ms/line]

1 dimension: MH Mode

2 dimension: MR Mode (K=2.4)

Sub Scan: 3.85, 7.7l/mm

Depends on the degree of data reduction.

Minimum Value: 10, 20

Can be recognized in 40ms.

G3 Machine

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KX-FT981LA-B / KX-FT987LA-B

6. Explanation of Communication and Compression Technology a. G3 Communication Signals (T. 30 Binary Process) For G3 Facsimile communication, this is the procedure for exchanging control signals between the sending and receiving machines both before and after transmission of image signals. Control signals at 300 bps FSK are: 1850 Hz...0, 1650Hz...1. An example of a binary process in G3 communication is shown below.

Explanation of Signals Control signals are comprised mainly of 8-bit identification signals and the data signals added to them. Data signals are added to DIS and DCS signals.

Signal.....DIS (Digital Identification Signal)

Identification Signal Format.....00000001

Function:

Notifies the capacity of the receiving unit. The added data signals are as follows.

Signal.....DCS (Digital Command Signal)

Identification Signal Format.....X1000001

Example (Some models do not support the following items.):

Bit No. DIS/DTC DCS 1 Transmitter --- T.2 operation 2 Receiver --- T.2 operation Receiver --- T.2 operation 3 T.2 IOC = 176 T.2 IOC = 176 4 Transmitter --- T.3 operation 5 Receiver --- T.3 operation Receiver --- T.3 operation 6 Reserved for future T.3 operation features 7 Reserved for future T.3 operation features. 8 Reserved for future T.3 operation features. 9 Transmitter --- T.4 operation

Page 33

KX-FT981LA-B / KX-FT987LA-B

Bit No. DIS/DTC DCS 10 Receiver --- T.4 operation Receiver --- T.4 operation 11,12,13,14 0,0,0,0 0,1,0,0 1,0,0,0 1,1,0,0 0,0,1,0 0,1,1,0 1,0,1,0 1,1,1,0 0,0,0,1 0,1,0,1 1,0,0,1 1,1,0,1 0,0,1,1 0,1,1,1 1,0,1,1 1,1,1,1

Data signaling rate V.27 ter fall back mode V.27 ter V.29 V.27 ter and V.29 Not used Reserved Not used V.27 ter and V.29 and V.33 Not used Reserved Not used V.27 ter and V.29 and V.33 and V.17 Not used Reserved Not used Reserved

Data signaling rate 2400 bit/s, V.27 ter 4800 bit/s, V.27 ter 9600 bit/s, V.29 7200 bit/s, V.29 14400 bit/s, V.33 12000 bit/s, V.33 Reserved Reserved 14400 bit/s, V.17 12000 bit/s, V.17 9600 bit/s, V.17 7200 bit/s, V.17 Reserved Reserved Reserved

Reserved 15 R8×7.7 lines/mm and/or 200×200 pels/25.4mm R8×7.7 lines/mm and/or 200×200 pels/25.4mm 16 Two-dimensional coding capability Two-dimensional coding capability 17, 18 (0, 0)

(0, 1)

Recording width capabilities 1728 picture elements along scan line length of 215 mm ± 1% 1728 picture elements along scan line length of 215 mm ± 1%

Recording width

1728 picture elements along scan line length of

215 mm ± 1%

2432 picture elements along scan line length of

303 mm ± 1%

2048 picture elements along scan line length of 255 mm ± 1% 2432 picture elements along scan line length of 303 mm ± 1%

(1, 0)

1728 picture elements along scan line length of 215 mm ± 1%

2048 picture elements along scan line length of

255 mm ± 1%

2048 picture elements along scan line length of

255 mm ± 1% (1, 1) 19, 20 (0, 0) (0, 1) (1, 0) (1, 1) 21, 22, 23 (0, 0, 0) (0, 0, 1) (0, 1, 0) (1, 0, 0) (0, 1, 1) (1, 1, 0) (1, 0, 1) (1, 1, 1)

Invalid

Maximum recording length capability

A4 (297 mm)

Unlimited

A4 (297 mm) and B4 (364 mm)

Invalid

Minimum scan line time capability of the receiver

20 ms at 3.85 l/mm: T

40 ms at 3.85 l/mm: T

10 ms at 3.85 l/mm: T

5 ms at 3.85 l/mm: T

10 ms at 3.85 l/mm: T

20 ms at 3.85 l/mm: T

40 ms at 3.85 l/mm: T

0 ms at 3.85 l/mm: T

= T

7.7

= T

7.7

= T

7.7

= T

7.7

= 1/2 T

7.7

= 1/2 T

7.7

= 1/2 T

7.7

= T

7.7

3.85

Invalid Maximum recording length A4 (297 mm) Unlimited B4 (364 mm) Invalid Minimum scan line time 20 ms 40 ms 10 ms 5 ms

0 ms

24 Extend field Extend field 25 2400 bit/s handshaking 2400 bit/s handshaking 26 Uncompressed mode Uncompressed mode 27 Error correction mode Error correction mode 28 Set to "0". Frame size 0 = 256 octets 1 = 64 octets 29 Error limiting mode Error limiting mode 30 Reserved for G4 capability on PSTN Reserved for G4 capability on PSTN 31 T.6 coding capability T.6 coding enabled 32 Extend field Extend field 33 (0) (1)

Validity of bits 17, 18

Bits 17, 18 are valid

Bits 17, 18 are invalid 34 Recording width capability 1216 picture elements along

Recording width Recording width indicated by bits 17, 18 Recording width indicated by this field bit information Middle 1216 elements of 1728 picture elements

scan line length of 151 ± mm 1% 35 Recording width capability 864 picture elements along scan

Middle 864 elements of 1728 picture elements

line length of 107 ± mm 1% 36 Recording width capability 1728 picture elements along

Invalid

scan line length of 151 ± mm 1% 37 Recording width capability 1728 picture elements along

Invalid

scan line length of 107 ± mm 1% 38 Reserved for future recording width capability.

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KX-FT981LA-B / KX-FT987LA-B

Bit No. DIS/DTC DCS 39 Reserved for future recording width capability. 40 Extend field Extend field 41 R8×15.4 lines/mm R8×15.4 lines/mm 42 300×300 pels/25.4 mm 300×300 pels/25.4 mm 43 R16×15.4 lines/mm and/or 400×400 pels/25.4 mm R16×15.4 lines/mm and/or 400×400 pels/25.4 mm 44 Inch based resolution preferred Resolution type selection

"0": neritic based resolution

"1": inch based resolution 45 Metric based resolution preferred Don’t care 46 Minimum scan line time capability for higher resolutions

= T

"0": T

15.4

"1": T

7.7

15.4

= 1/2T

7.7

Don’t care

47 Selective Polling capability Set to "0". 48 Extend field Extend field

Note 1 - Standard facsimile units conforming to T.2 must have the following capability: Index of cooperation (IOC)=264. Note 2 - Standard facsimile units conforming to T.3 must have the following capability: Index of cooperation (IOC)=264. Note 3 - Standard facsimile units conforming to T.4 must have the following capability: Paper length=297 mm.

Signal Identification Signal Format Function

Training 1 ——————— A fixed pattern is transmitted to the receiving side at a speed (2400

bps to 9600 bps) designated by DCS, and the receiving side opti-

mizes the automatic equalizer, etc., according to this signal. TCF (Training Check) CFR

X0100001 Notifies the sending side that TCF has been properly received. If

(Confirmation to Receive)

Training 2 ——————— Used for reconfirming the receiving side like training 1. Image Signal Refer to the next page. ——————— RTC (Return to Control)

EOP

X1110100 End of one communication (End of Procedure) MCF

X0110001 End of 1 page reception (Message Confirmation) DCN

X1011111 Phase E starts. (Disconnect) MPS

X1110010 Completion of transmission of 1 page. If there are still more docu(Multi-Page Signal)

PRI-EOP

X1111100 If there is an operator call from the sender, it is output after RTC. (Procedural Interrupt-EOP) PIP

X0110101 This is output when an operator call is received. (Procedural Interrupt Positive)

——————— Sends 0 continuously for 1.5 seconds at the same speed as the

training signal.

TCF is not properly received, FTT (Failure To Train) X0100010 is relayed to the sender. The sender then reduces the transmission speed by one stage and initiates training once again.

——————— Sends 12 bits (0...01 × 6 times) to the receiver at the same speed as

the image signal and notifies completion of transmission of the first sheet.

ments to be sent, they are output instead of EOP. After MCF reception, the sender transmits an image signal of the second sheet.

Page 35

b. Redundancy Compression Process Coding Mode This unit uses one-dimensional MH format.

KX-FT981LA-B / KX-FT987LA-B

Page 36

KX-FT981LA-B / KX-FT987LA-B

6.6.2. Modem Circuit Operation

The modem (IC5) has all the hardware satisfying the CCITT standards mentioned previously. When the ASIC IC1 (61) is brought to a low level, the modem (IC5) is chip-selected and the resistors inside IC are selected by the select signals from ASIC (IC1) ADR0-ADR4. The commands are written through the data bus, and all the processing is controlled by the ASIC (IC1) according to CCITT procedures. The INT signal dispatched from IRQ (pins 100 of IC5) to ASIC (IC1) when the transmission data is accepted and the received data is demodulated, the ASIC (IC1) implements post processing. This modem (IC5) has an automatic application equalizer. With training signal 1 or 2 during G3 reception, it can automatically establish the optimum equalizer. The modem (IC5) operates using the 32.256 MHz clock (X3).

1. Facsimile Transmission The digital image data on the data bus is modulated in the modem (IC5), and sent from pin 56 via Analog SW IC10, amplifier IC9 and the NCU section to the telephone line.

Refer to Check Sheet for Signal Route (P.114).

2. Facsimile Reception The analog image data which is received from the telephone line passes through the NCU section and enters pin 47 of the modem (IC5). The signals that enter pin 47 of the modem (IC5) are demodulated in the board to digital image signals, then placed on the data bus. In this case, the image signals from the telephone line are transmitted serially. Hence, they are placed on the bus in 8 bit units. Here, the internal equalizer circuit reduces the image signals to a long-distance receiving level. This is designed to correct the characteristics of the frequency band centered about 3 kHz and maintain a constant receiving sensitivity. It can be set in the service mode.

Refer to Check Sheet for Signal Route (P.114).

3. DTMF Transmission (Monitor tone) The DTMF signal generated in the modem (IC5) is output from pin 56, and is then sent to the circuit on the same route as used for facsimile transmission.

Refer to Check Sheet for Signal Route (P.114).

(DTMF Monitor Tone) Refer to Check Sheet for Signal Route (P.114).

4. Call Tone Transmission This is the call signal which is generated in the ASIC (IC1) and sent to the speaker.

Refer to Check Sheet for Signal Route (P.114).

5. Busy/Dial Tone Detection The path is the same as FAX receiving. When it is detected, the carrier detect bit of the resistor in the modem (IC5) becomes 1, and this status is monitored by the ASIC (IC1).

6. Caller ID Detection The caller ID signal which is received from the telephone line enters pin 50 of the modem (IC5).

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KX-FT981LA-B / KX-FT987LA-B

6.7. NCU Section

6.7.1. General

It is composed of bell detection circuit, pulse dial circuit, line amplifier, sidetone circuits.

6.7.2. Bell Detection Circuit

1. Circuit Operation The signal waveform for each point is indicated below. The signal (low level section) input to pin 19 of ASIC IC1 on the digital board. TEL LINE → PC102 (1, 2 → 4) → CN101 (9) → {CN2 (9) → IC1 (19)}

Note:{ } : inside the digital board

6.7.3. ON/OFF Hook Circuit

Normally (ON-HOOK condition), LINE RELAY (RLY101) is OFF. While OFF-HOOK, RLY101 turns ON. This LINE RELAY is controlled by pin 130 of IC1 through the Q7.

ON-HOOK:

IC1 (130) Low Level → Q7 OFF → RLY101 OFF

OFF-HOOK:

IC1 (130) High Level → Q7 ON → RLY101 ON

6.7.4. Pulse Dial Circuit

Make state:

IC1 (130) High Level → Q7 ON → RLY101 ON

Break state:

IC1 (130) Low Level → Q7 OFF → RLY101 OFF

Page 38

KX-FT981LA-B / KX-FT987LA-B

6.7.5. Line Amplifier and Side Tone Circuits

1. Circuit Operation The reception signal received as output from line transformer T101 is given as input to C108, R109 and IC101(2). Then it is input to the reception system at an amplifier gain of 2.5 dB from pin (2). The transmission signal is input from CN101 pin (6), and output to the TEL line through T101. Without a side tone circuit, the transmission signal would return to the reception amplifier via C113 and R114. Here, the signal output from CN101 pin (6) passes through C113, R113, R112, C109 and R110, and enters the amplifier IC101 pin (2). This is used to cancel the return portion of the transmission signal. This is the side tone circuit.

Page 39

KX-FT981LA-B / KX-FT987LA-B

6.7.6. Calling Line Identification Circuit

1. Function This unit is compatible with the Caller ID service offered by your local telephone company. To use this feature, you must subscribe to a Caller ID service. The data for the caller ID from the telephone exchange is sent during the interval between the first and second rings of the bell signal. The data from the telephone exchange is a modem signal which is modulated in an FSK (Frequency Shift Keying) format. Data "0" is a 1200 Hz sine wave, and data 1 a 2200 Hz sine wave. There are two type of the message format which can be received:i.e.the single data message format and multiple data message format. The multiple data format allows to transmit the name and data code information in addition to the time and telephone number data. When there is multiple data in the unit, the name or telephone number are displayed.

2. Circuit Operation: The caller ID signal input from TEL LINE is processed with MODEM IC5. Refer to Check Sheet for Signal Route (P.114) for the route of caller ID signal.

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KX-FT981LA-B / KX-FT987LA-B

6.7.7. Calling Line Identification Circuit (DTMF)

2. Circuit Operation: The Caller ID signal from TEL LINE is processed with MODEM (IC5). Refer to Check Sheet for Signal Route (P.114) for the route of Caller ID (DTMF) signal.

Page 41

KX-FT981LA-B / KX-FT987LA-B

6.8. ITS (Integrated Telephone System) and Monitor Section

6.8.1. General

The general ITS operation is performed by the modem IC5. The alarm tone, the key tone, the calling tone and the beep are output from the ASIC IC1 (digital board).

6.8.2. Telephone Monitor (KX-FT981 only)

1. Function This is the function when you are not holding the handset and can hear the caller’s voice from the line.

2. Signal path Refer to Check Sheet for Signal Route (P.114)

6.8.3. Speakerphone Circuit (KX-FT987 only)

1. Function The circuit controls the automatic switching of the transmitted and received signals, to and from the telephone line, when the unit is used in the hands-free mode.

2. Circuit Operation The speakerphone can only provide duplex.

3. Signal path Refer to Check Sheet for Signal Route (P.114)

6.8.4. Handset Circuit

1. Function This circuit controls the conversation over the handset, i.e. the transmitted and received voices to and from the handset.

2. Signal path Refer to Check Sheet for Signal Route (P.114)

6.8.5. Monitor Circuit for Each Signals

1. Function This circuit monitors various tones, such as 1 DTMF tone, 2 Alarm/Beep/Key tone/Bell 3 Dummy ring back tone.

2. Signal path Refer to Check Sheet for Signal Route (P.114)

6.9. TAM Interface Section (KX-FT981 only)

1. Function When TAM is connected to this unit, the unit receives documents for FAX calls or the external TAM records a voice message automatically.

2. Circuit Operation The TAM INTERFACE circuit consists of a CNG signal from the other party’s detection circuit, VOX detection circuit (to judge sound/no-sound) and RLY101 (to separate EXT. TAM).

a. CNG/VOX signal detection circuit

The CNG signal from the other party’s FAX is detected in MODEM IC5 (digital board).

b. Remote receiving

This is the parallel connected DTMF signal for the TEL mode between a and b. When the other party is a FAX, the unit changes to FAX receiving.

3. Signal path Refer to Check Sheet for Signal Route (P.114)

Page 42

KX-FT981LA-B / KX-FT987LA-B

6.10. ATAS (Automatic Telephone Answering System) Section (KX-FT987 only)

1. Function The ATAS main operation is performed by the special IC5 (MODEM). IC6 (FLASH MEMORY) control signals are input from ASIC IC1.

a. Greeting/Message Recording b. ICM Recording c. Greeting/Message/ICM play to speaker d. Greeting/Message/ICM play to Tel Line e. Vox Detection

2. Signal Path Refer to Check Sheet for Signal Route (P.114)

Page 43

KX-FT981LA-B / KX-FT987LA-B

6.11. Operation Board Section

The unit consists of a LCD (Liquid crystal display), KEYs and LEDs (light-emitting diodes). They are controlled by the Gate Array (IC301) and ASIC (IC1: on the DIGITAL BOARD). The key matrix table is shown below.

LCD

(Chip on board type)

ASIC

IC1

CN7

CN301

CN302

KSL0~4

GATE ARRAY

IC301

8 x 5

KIN0~7

XLED8, 9

XLED13

DOCUMENT TOP SENSOR DOCUMENT SET SENSOR

DIGITAL BOARD OPERATION BOARD

KX-FT981 / KX-FT987: OPERATION BOARD: BLOCK DIAGRAM

KEYS

MATRIX

LED

D301

Page 44

KX-FT981LA-B / KX-FT987LA-B

6.12. LCD Section

The Gate Array IC(IC301) works only for writing the ASCII code from the data bus (D4~D7). V0 is supplied for the crystal drive. R312, R313, R314 and R316 are density control resistors. Consequently, in this unit, the timing (positive clock) is generated by the LCD interface circuitry in the gate array (IC301).

English font (Global) 2 lines

DIsplay mode Density Normal Dark

LED1 (IC301-22pin) H L

LED15 (IC301-21pin) L L

LED14 (IC301-20pin) Hi-Z L

Page 45

6.13. Power Supply Board Section

This power supply board uses the switching regulator method.

KX-FT981LA-B / KX-FT987LA-B

[Input Circuit]

The input current goes into the input rectifier circuit through the filter circuit. The filter circuit decreases the noise voltage and the noise electric field strength.

[Rectifier Circuit] The input current is rectified by D101,D102,D103 and D104 and charges C106 to make DC voltage. Then it supplies power to the converter circuit.

[Kick-on voltage circuit] Bias is applied to the Q101 gate via this circuit when the AC power is turned on and Q101 begins operating.

Page 46

KX-FT981LA-B / KX-FT987LA-B

The following is an overview of how the power supply unit is controlled. The control method of this power supply unit is pulse width modulation.

When Q1 is ON, the energy is charged in the transfer primary coil according to E1. When Q1 is OFF, the energy is output from the

secondary transfer as follows. L → D

→ Load → L

Then the power is supplied to the Load. When Q1 is ON, power is not output from the secondary side. The output voltage is fed

back in the control IC according to the error amp rectifier. Then depending on how T

is controlled, stabilization occurs. Also,

when the current load becomes too large, in order to decrease the voltage output, the increase in is controlled and the output voltage is stabilized. Therefore, basically the timing: Ton/Toff of Q1 controls the output voltage.

Page 47

KX-FT981LA-B / KX-FT987LA-B

[Surge Absorber Circuit]

This circuit is for absorbing surge voltage generated by the transformer.

[Control Circuit and Detecting Circuit] The control circuit amplifies the output with increased voltage detected in the error detecting circuit. Then it drives the main transistor. In this power supply, the duty ratio is defined by changing the ON period of the main transistor. This is shown as follows. When the output voltage of the 24V circuit increases, the current of the photo coupler PC101 increases, the pulse width of the output control IC becomes narrower and the ON period of Q101 becomes shorter.

[Over Current Limiter (O.C.L)]

The highest drain current (Q101) is limited by a limiter circuit (IC101) of 24V. The 24V output is limited by this circuit.

[Over Voltage Circuit]

If the 24V output increases because the error detecting circuit or control circuit is broken, IC101 will recognize this signal and output becomes 0V.

Dummy load method (to quickly check the power supply output)

Refer to Power Supply Board Section (P.119).

Page 48

KX-FT981LA-B / KX-FT987LA-B

7 Location of Controls and Components

7.1. Overview

(1) Speaker (2) Document guides (3) Paper stacker (KX-FT987 only) (4) Document feeder tray (5) Top cover (6) Document exit (7) Document entrance (8) Top cover release button

7.2. Control Panel

(1) [CALLER ID]

• To use Caller ID features.

(2) [STOP]

• To stop an operation or programming session.

• To erase a character/number. Press and hold to erase all characters/numbers.

(3) [FLASH]

• To access special telephone services or for transferring extension calls.

(4) [REDIAL/PAUSE]

• To redial the last number dialled. If the line is busy when you send a fax, the unit will automatically redial the number up to 2 times.

• To insert a pause during dialing.

(5) [RECORD] (KX-FT987 only)

• To record your greeting message.

• To record a voice memo.

(6) [ERASE] (KX-FT987 only)

• To erase messages.

• To erase a stored item.

(7) [PLAYBACK] (KX-FT987 only)

• To play messages.

(8) [AUTO ANSWER]

• To turn the auto answer setting ON/OFF.

Page 49

(9) Station keys

• To use one-touch dial feature.

(10) [FAX/START]

• To start sending or receiving a fax.

(11) [COPY]

• To copy a document.

(12) [MIC] (KX-FT987 only)

• The built-in microphone.

(13) [TONE]

• To change from pulse to tone temporarily during dialling when your line has rotary pulse services.

(14) [HANDSET MUTE] (KX-FT981 only)

[MUTE] (KX-FT987 only)

• To mute your voice during a conversation. Press again to resume the conversation.

(15) [MONITOR] (KX-FT981 only)

• To initiate dialling without lifting the handset.

(16) [DIGITAL SP-PHONE] (KX-FT987 only)

• For speakerphone operation.

(17) [BROADCAST]

• To transmit a document to multiple parties.

(18) Navigator/ [VOLUME] [PHONEBOOK]

• To search for a stored item.

• To select features or feature settings during programming.

• To adjust volume.

• To open a phonebook.

(19) [SET]

• To store a setting during programming.

(20) [MENU]

• To initiate or exit programming.

(21) [LOWER]

• To select stations 6-10 for the one-touch dial feature.

KX-FT981LA-B / KX-FT987LA-B

8 Installation Instructions

8.1. Installation Space

The space required to install the unit is shown below. The dimensions given are necessary for the unit to operate efficiently.

Note:

• Avoid excessive heat or humidity.

• Use the unit within the following ranges of temperature and humidity.

• Ambient temperature: 5°C to 35°C

• Relative humidity: 20% to 80% (without condensation)

• Power cord length should be less than 5 meters. Using a longer cord may reduce the voltage or cause malfunctions.

• Avoid direct sunlight.

• Do not install near devices which contain magnets or generate magnetic fields.

• Do not subject the unit to strong physical shock or vibration.

• Keep the unit clean. Dust accumulation can prevent the unit from functioning properly.

• To protect the unit from damage, hold both sides when you

move it.

Page 50

KX-FT981LA-B / KX-FT987LA-B

8.2. Connections

Important:

• The unit will not function when there is a power failure.

To make calls in emergency situations, you should connect a telephone that can function during a power failure to the telephone line.

(1) Paper stacker (KX-FT987 only)

• Make sure the paper stacker must not touch the wall.

(2) Power cord

• Connect to the power outlet (120 V, 60 Hz).

(3) Telephone line cord

• Connect to [LINE] jack and a single telephone line jack.

(4) [EXT] jack (KX-FT981 only)

• Remove the stopper if attached. (5) Handset cord (6) Extension telephone (not included)

8.3. Installing the Recording Paper

1. Open the top cover by pressing the top cover release but-

ton ( ).

2. Install the recording paper.

Caution:

• When you operate this product, the power outlet should

be near the product and easily accessible.

• Keep the unit away from walls as far as possible to pre-

vent a recording paper jam.

Note:

Before you can make calls, the dialling mode setting may need to be changed.

3. Insert the leading edge of the paper into the opening

above the thermal head ( ).

4. Pull the paper out of the unit.

• Make sure that there is no slack in the paper roll.

Page 51

5. Close the top cover securely by pushing down on both sides.

6. For KX-FT981: Press [FAX/START], then tear off the excess paper by pulling it towards you.

KX-FT981LA-B / KX-FT987LA-B

8.4. Documents the Unit can Send

For KX-FT987: Press [FAX/START] to cut the paper.

Note:

• If the paper is secured with glue or tape, cut approximately 15 cm from the beginning of the roll before installing it.

• When the power cord is connected, a message is printed each time the top cover is opened then closed. If the recording paper is installed upside down, the message will not be printed. Install the paper correctly.

• For accessory information, see Optional Accessories

(P.9).

Document weight

• Single sheet: 45 g/m

to 90 g/m

• Multiple sheets: 60 g/m2 to 80 g/m

Note:

• Remove clips, staples or other fasteners.

• Do not send or copy documents that are on the following types of paper: (Make a copy of the document using another copier and send the copy.) — Chemically treated paper such as carbon or carbonless

duplicating paper — Electrostatically charged paper — Badly curled, creased or torn paper — Paper with a coated surface — Paper with a faint image — Paper with printing on the opposite side that can be seen

through the other side, such as newsprint.

• Check that ink, paste or correction fluid has dried completely.

• To send a document with a width of less than 210 mm, we recommend using a copy machine to copy the original document onto A4 or letter-sized paper, then sending the copied

document.

Page 52

KX-FT981LA-B / KX-FT987LA-B

9 Operating Instructions

9.1. Setting Logo

Your logo will be printed on the top of each page sent from your unit. The logo can be your name or the name of your company. Refer to Translation Lists (P.9) for display.

1. Press [MENU].

To select characters with dial keypad

2. Press [] or [] repeatedly to display the following.

3. Press [SET].

• The cursor ( ) will appear on the display.

4. Enter your logo, up to 30 characters. See the following character table for details.

5. Press [SET].

• The next feature will be displayed.

6. Press [MENU].

Note:

To enter another character that is located on the same dial key, press [] to move the cursor to the next space.

To enter your logo

Example: “BILL“

1. Press [2] 4 times.

2. Press [4] 3 times.

3. Press [5] 3 times.

4. Press [] to move the cursor to the next space and press [5] 3 times.

Page 53

To change uppercase or lowercase letters

Pressing the [] button will change to uppercase or lower- case letters alternately.

1. Press [2] 4 times.

2. Press [4] 3 times.

3. Press [].

4. Press [5] 3 times.

To correct a mistake

1. Press [] or [] to move the cursor to the incorrect character.

2. Press [STOP].

• To erase all characters, press and hold [STOP].

3. Enter the correct character.

KX-FT981LA-B / KX-FT987LA-B

Page 54

KX-FT981LA-B / KX-FT987LA-B

10 Test Mode

The codes listed below can be used to perform simple checks for some of the unit’s functions. When complaints are received from customers, they provide an effective tool for identifying the locations and causes of malfunctions. To do this, you set the Service mode (Refer to Operation Flow (P.58).) first, then operate the below test items.

Test Mode Type of Mode Code Function

Operation after code

input

MEMORY CLEAR Service Mode [5] [5] [0] Refer to Memory Clear Specification (P.61).

[SET]

FLASH MEMORY CHECK

DTMF SINGLE TONE TEST

MODEM TEST Service Mode [5] [5] [4] Telephone line circuit is connected automatically, output the following signals on

SCAN TEST Service Mode [5] [5] [5] Turns on the LEDs of the CIS and operates the read systems.

MOTOR TEST Service Mode [5] [5] [6] Rotates the transmission and reception motor to check the operation of the motor.

Service Mode [5] [5] [1] Indicates the version and checks the sum of the FLASH MEMORY.

[SET]

Service Mode [5] [5] [2] Outputs the DTMF as single tones. Used to check the frequencies of the individ-

[1]: ON

[2]: OFF

[SET]

ual DTMF tones. Refer to DTMF Single Tone Transmit Selection (P.56).

the circuit line.

1) OFF 2) 9600bps 3) 7200bps 4) 4800bps 5) 2400bps 6) 300bps 7) 2100Hz

8) 1100Hz

Refer to CIS (Contact Image Sensor) Section (P.125).

02: FAX TX / Reading memory 06: Cutter (KX-FT987 only) 08: Recording paper is fed 10: Copy 13: Recording Paper reverse

Press [STOP] button to quit.

LED TEST Service Mode [5] [5] [7] All LEDs above the operation panel board flash on and off, or are illuminated.

[SET]

LCD TEST Service Mode [5] [5] [8] Checks the LCD indication.

[SET]

KEY TEST Service Mode [5] [6] [1] Checks the key operation except [STOP] key.

The available key is any one that except [STOP] key.

CUTTER TEST (KX-FT987 only)

MEMORY CLEAR (except History data)

VOICE PROMPT TEST (KX-FT987 only)

Service Mode [5] [6] [2] Perform cutter test 10 times.

[SET]

Service Mode [7] [1] [0] Refer to Memory Clear Specification (P.61).

[SET]

Service Mode [7] [8] [4] You can hear the voice prompt from speaker after pressing “SET” key.

[SET]

Illuminates all the dots to check if they are normal. Refer to No LCD Indication (P.122).

Indicates the button code on the LCD while the button is pressed, see Button Code Table (P.56) Refer to No Key Operation (P.122).

Page 55

Test Mode Type of Mode Code Function

Operation after code

input

SENSOR TEST & VOX TEST

Service Mode [8] [1] [5] If you enter this mode and operate sensor levers with your hands, the LCD display

[SET]

of the related sensor (or switch) turns ON / OFF. Also, when copying a document, the related sensor will turn ON / OFF. For each sensor’s operation, refer to Sensors and Switches (P.26).

LCD DISPLAY

Do: Document set sensor

Paper inserted. Turns on when a document is inserted.

Sn: Document top sensor.

At the read position, turns on when the front cover is opened and the sensor lever is pressed directory.

Co: Cover open sensor

Turns on and off when the front cover is opened and closed.

Jm: JAM sensor

When JAM sensor is on “Jm” functions.

Ct: Cutter sensor (KX-FT987 only)

When cutter sensor is on “Ct” functions.

Vx: Vox signal (KX-FT987 only)

:Detection signal for the tone on the line. Turns on when there is a tone signal on the line

Note:

• Press [STOP] button to quit.

DIGITAL SPEAKERPHONE RX & TX CHECK (KX-FT987 only)

PRINT TEST PATT ERN

Service Mode [8] [4] [1] Refer to Digital Speakerphone (KX-FT987 only) (P.117).

SPEAKERPHONE

Service Mode [8] [5] [2] Prints out the test pattern.

[SET]

You can select 1~4. (See Print Test Pattern (P.57))

KX-FT981LA-B / KX-FT987LA-B

Page 56

KX-FT981LA-B / KX-FT987LA-B

10.1. DTMF Single Tone Transmit Selection

When set to ON (=1), the 12 keys and transmission frequencies are as shown.

When set to OFF (=2), the 12 keys and transmission frequencies are as shown.

key High Frequency (Hz) key Low Frequency (Hz)

“1” 697 “5” 1209

“2” 770 “6” 1336

“3” 852 “7” 1477

“4” 941 “8” 1633

Note:

After performing this check, do not forget to turn the setting off. Otherwise, dialing in DTMF signal will not work.

10.2. Button Code Table

Code Button Name Code Button Name Code Button Name

04 FAX /START 31 1 47 CALLER ID

05 LOWER 32 2

06 COPY 33 3 64 STATION KEY 1

08 MONITOR or SP-PHONE 34 4 65 STATION KEY 2

09 BROADCAST 35 5 66 STATION KEY 3

0A HANDSET MUTE or MUTE 36 6 67 STATION KEY 4

0C AUTO ANSWER 37 7 68 STATION KEY 5

0D SET 38 8

[ ] NEXT

[ ] PREV

14 RECORD (KX-FT987 only) 3C #

16 ERASE (KX-FT987 only) 3D REDIAL/PAUSE

18 PLAYBACK (KX-FT987 only) 3E FLASH (RECALL)

39 9

3A 0 00 NO INPUT

3B -- STOP

High (Hz) 1209 1336 1477

Low (Hz)

697 “1” “2” “3”

770 “4” “5” “6”

852 “7” “8” “9”

941

“”

“0” “#”

20 MENU

25 [ + ] VOLUME

26 [—] VOLUME

Page 57

10.3. Print Test Pattern

KX-FT981LA-B / KX-FT987LA-B

1. Platen roller

3. Thermal head 1 dot

2. Left margin / Top margin

4. Use this test pattern to confirm the platen roller timing.

Page 58

KX-FT981LA-B / KX-FT987LA-B

11 Service Mode

The programming functions are used to program the various features and functions of the machine, and to test the machine. This facilitates communication between the user and the service man while programming the unit.

11.1. Programing and Lists

11.1.1. Operation

There are 2 basic categories of programming functions, the User Mode and the Service Mode. The Service Mode is further broken down into the normal and special programs. The normal programs are those listed in the Operating Instructions and are available to the user. The special programs are only those listed here and not displayed to the user. In both the User and Service Modes, there are Set Functions and Test Functions. The Set Functions are used to program various features and functions, and the Test Functions are used to test the various functions. The Set Functions are accessed by entering their code, changing the appropriate value, then pressing the SET key. The Test Functions are accessed by entering their code and pressing the key listed on the menu. While programming, to cancel any entry, press the STOP key.

11.1.2. Operation Flow

Refer to Translation Lists (P.9) for display.

Page 59

11.1.3. Service Function Table

KX-FT981LA-B / KX-FT987LA-B

Code Function Set Value Effective

Range

501 Pause time × 100 msec 001~600 030 ----------

503 Dial speed select 1: 10 pps

2: 20 pps

510 VOX time (KX-FT987 only) 1:6 sec

511 VOX sensitivity (KX-FT987 only)

512 VOX mode Detection (KX-FT987 only) 1: A

514 Bell detection time × 100 msec 1~9 6 ----------

520 CED frequency select 1: 2100 Hz

521 International mode select 1: ON

522 Auto standby select 1: ON

523 Receive equalizer select 1: 0 km

524 Transmission equalizer select 1: 0 km

544 Document feed position × mm 1~9 5 When the ADF function is in correct, adjust the feed

550 Memory Clear See Memory Clear Specification (P.61).

551 Flash memory check See Test Mode (P.54).

552 DTMF single tone test 1: ON

553 Monitor on FAX communication select 1: OFF

554 Modem test See Test Mode (P.54).

555 Scan test See Test Mode (P.54).

556 Motor test See Test Mode (P.54).

557 LED test See Test Mode (P.54).

558 LCD test See Test Mode (P.54).

559 Document jam detection select 1: ON

560 Cutter selection

(KX-FT987 only)

561 KEY test See Test Mode (P.54).

562 Cutter test (KX-FT987 only) See Test Mode (P.54).

567 T0 timer × second 001~255 046 ----------

570 BREAK % select 1: 61%

571 ITS auto redial time set × number of

572 ITS auto redial line disconnection time

set

2:4 sec

1: High 2: Low

2: B

2: 1100 Hz

2: OFF

2: 1.8 km 3: 3.6 km 4: 7.2 km

2: OFF

2: PHASE B 3: ALL

2: OFF

1: ON 2: OFF

2: 67%

times

× second 001~999 065 Sets the interval of ITS redialing.

1, 2 1 ----------

1, 2 1 Setting of the end of call confirmation VOX.

1, 2 1 When the TAM (or EXT TAM) does not stop recording

1, 2 1 ----------

1, 2 1 See Symptom/Countermeasure Table for long distance

1, 2 1 The resolution reverts to the default when transmission

1~4 1 When the telephone station is far from the unit or recep-

1~4 1 When the telephone station is far from the unit or trans-

1, 2 2 See Test Mode (P.54).

1~3 1 Sets whether to monitor the line signal with the unit's

1, 2 1 Sets whether or not to detect a paper jam. If a docu-

1, 2 1 Turns off the cutter function.

1, 2 1 Sets the % break of pulse dialing according PBX.

00~99 00 Selects the number of times that ITS is redialed (not

Default Remarks

the ICM because noise is detected on the telephone line, change this setting to “LOW”.

and international calls in The unit can copy, but can- not transmit/receive (P.87).

is complete.

tion cannot be performed correctly, adjust accordingly.

mission cannot be performed correctly, adjust accordingly.

position.

speaker during FAX communication or not.

ment with a length longer than 600 mm is copied or transmitted, the unit stops copying or transmitting as a paper jamming because a document over 600 mm is not normal. In the factory, transmitting or copying a document longer than 600 mm is done as an aging test. In this case, OFF is selected.

including the first dial).

Page 60

KX-FT981LA-B / KX-FT987LA-B

Code Function Set Value Effective

Default Remarks

Range

573 Remote turn-on ring number set × number of

rings

580 TAM continuous tone detection

(KX-FT987 only)

1: ON 2: OFF

590 FAX auto redial time set × number of

times

591 FAX auto redial line disconnection time

× second 001~999 065 Sets the FAX redial interval during FAX communication.

00~99 10 Sets the number of rings before the unit starts to

receive a document in the TEL mode.

1, 2 1 ON: Stops TAM operation when Dial tone, etc are

detected.

00~99 02 Selects the number of redial times during FAX commu-

nication (not including the first dial).

set

592 CNG transmit select 1: OFF

2: ALL 3: AUTO

1~3 2 Lets you select the CNG output during FAX transmis-

sion. ALL: CNG is output at phase A. AUTO: CNG id output only when automatic dialing is performed. OFF: CNG id not output at phase A. Refer to Sometime there is a transmit problem (P.85).

593 Time between CED and 300bps 1: 75 msec

2: 500 msec 3: 1 sec

1~3 1 See Symptom/Countermeasure Table for long dis-

tance and international calls in The unit can copy, but

cannot transmit/receive (P.87). Refer to Receive Problem (P.86) and The unit can copy, but cannot transmit/receive (P.87).

594 Overseas DIS detection select 1: Detects at

the 1st time

1, 2 1 See Symptom/Countermeasure Table for long dis-

tance and international calls in The unit can copy, but

cannot transmit/receive (P.87). Refer to Sometime 2: Detects at the 2nd time

595 Receive error limit value set 1: 5 %

2: 10 % 3: 15 %

1~4 2 Sets the number of acceptable error lines when the

there is a transmit problem (P.85) and The unit can

copy, but cannot transmit/receive (P.87).

FAX reconstructs the received data. Refer to Receive

Problem (P.86).

4: 20 %

596 Transmit level set × -1 dBm 00~15 11 Selects the FAX transmission level. Refer to Sometime

there is a transmit problem (P.85) and Receive Prob-

lem (P.86).

598 Receiving sensitivity × -1 dBm 20~48 42 Used when there is an error problem. Refer to The unit

can copy, but the transmission and reception image

are incorrect (P.90).

710 Memory clear except History data Refer to Memory Clear Specification (P.61).

717 Transmit speed select 1: 9600 BPS

2: 7200 BPS 3: 4800 BPS 4: 2400 BPS

718 Receive speed select 1: 9600 BPS

2: 7200 BPS 3: 4800 BPS 4: 2400 BPS

722 Redial tone detect 1: ON

1~4 1 Adjusts the speed to start training during FAX transmis-

sion. Refer to Sometime there is a transmit problem

(P.85) and The unit can copy, but the transmission

and reception image are incorrect (P.90).

1~4 1 Adjusts the speed to start training during FAX recep-

tion. Refer to Receive Problem (P.86) and The unit

can copy, but the transmission and reception image

are incorrect (P.90).

1, 2 2 Sets the tone detection mode after redialing.

2: OFF

763 CNG detect time for friendly reception 1: 10 sec

1~3 3 Selects the CNG detection tone of friendly reception. 2: 20 sec 3: 30 sec

773 DIS-DCS interval 1: 500 msec

2: 200 msec

1, 2 2 This is similar to #594. The time interval from receiving

DIS to sending DCS can be changed to wait for the echo canceler to recover.

774 T4 timer × 100 msec 00~99 00 Use this function when delay occurs in the line and

communication (ex. Mobile comm) does not work well.

784 Voice Prompt Test (KX-FT987 only) See Test Mode (P.54).

815 Sensor test & Vox test (Vox test is available for KX-FT987 only.) See Test Mode (P.54).

841 Digital SP-Phone check (KX-FT987 only) See Digital Speakerphone (KX-FT987 only) (P.117).

845 Setting scanning density 00~32 00~32 08 Select scanning density when the code No.58 is set

“Normal”. If you want darker, select smaller value. If you want fainter, select larger value. Refer to Program Mode Table (P.93).

852 Print test pattern See Test Mode (P.54).

853 Top margin × mm 1~9 5 ----------

874 DTMF ON time × 10 msec 06~20 10 ----------

875 DTMF OFF time × 10 msec 06~20 10 ----------

Page 61

KX-FT981LA-B / KX-FT987LA-B

Code Function Set Value Effective

880 History list ----------

881 Journal 2 list See Special Service Journal Report (P.79).

882 Journal 3 list See Special Service Journal Report (P.79).

961 The time transmitting the false ring back

tone

962 The operator calling time × sec 05~30 10 Set the operator calling time through the speaker in

× sec 01~10 07 Set the time transmitting the false ring back tone to the

Range

Default Remarks

line in TEL/FAX mode.

TEL/FAX mode.

11.1.4. Memory Clear Specification

*1 Execute Service Mode #550 when you want to reset the all setting data keeping the user information.

Execute Service Mode #710 to clear the user information in case that Main Unit is recycled.

* Note:

• Please restart a power supply after clearing a memory.

Page 62

KX-FT981LA-B / KX-FT987LA-B

11.2. The Example of the Printed List

11.2.1. User Mode (KX-FT981)

Note:

The above values are the default values.

Page 63

11.2.2. User Mode (KX-FT987)

KX-FT981LA-B / KX-FT987LA-B

Page 64

KX-FT981LA-B / KX-FT987LA-B

11.2.3. Service Mode Settings (KX-FT981)

Note:

The above values are the default values.

11.2.4. Service Mode Settings (KX-FT987)

Note:

The above values are the default values.

Page 65

11.2.5. History

KX-FT981LA-B / KX-FT987LA-B

Note:

See the following descriptions of this report. Item No. (1) ~ (44) are corresponding to the listed items in Descriptions of the History Report (P.66).

Page 66

KX-FT981LA-B / KX-FT987LA-B

11.2.5.1. Descriptions of the History Report

(1) SOFTWARE VERSION

FLASH ROM version

(2) SUM

FLASH ROM internal data calculation.

(3) YOUR LOGO

The user logo recorded in the unit. If it is not recorded, NONE will be displayed.

(4) YOUR TELEPHONE NUMBER

The user telephone number recorded in the unit. If it is not recorded, NONE will be displayed.

(5) FAX PAGER NUMBER

If you program a pager number into the unit, the pager number will be displayed here.

(6) FACTORY-CUSTOMER

This shows how many days from factory production until the user turns ON the unit.

(7) MONTH

The shows the very first month, date, year and time set by the user after they purchased the unit.

(8) DAY

The shows the very first month, date, year and time set by the user after they purchased the unit.

(9) YEAR

The shows the very first month, date, year and time set by the user after they purchased the unit.

(10) TIME

The shows the very first month, date, year and time set by the user after they purchased the unit.

(11) USAGE TIME

The amount of time the unit has been powered ON.

(12) FACTORY-NOW

This shows how many days from factory production until the user prints out this history list.

(13) TEL MODE

The amount of time the TEL mode setting was used.

(14) FAX ONLY MODE

The amount of time the FAX mode setting was used.

(15) TEL/FAX MODE

The amount of time the TEL/FAX mode setting was used.

(16) TAM/FAX MODE

The amount of time the TAM/FAX mode setting was used.

(17) FINAL RECEIVE MODE

The last set receiving mode by the user.

(18) TONE/PULSE SELECTION

The most recently used setting used, either TONE or PULSE.

(19) RECEIVE REDUCTION

The compression rate when receiving.

(20) SETTING NO. OF DIRECTORY

The recorded directory stations.

(21) NUMBER OF COPY

The number of pages copied.

(22) NUMBER OF RECEIVE

The number of pages received.

(23) NUMBER OF SENDING

The number of pages sent.

(24) NUMBER OF CALLER ID

The number of times Caller ID was received.

(25) NUMBER OG RECORDING MESSAGE

The number of messages recorded in TAM.

(26)~(29) Not Used (30) NUMBER OF PRINTING WARNING LIST

The number of warning lists printed until now.

(31) NUMBER OF PRINTING HELP

The number of help lists printed until now.

(32) NUMBER OF DIVIDED PRINTING IN FAX RECEPTION

The number of faxes received that were divided into more than one sheet since the unit was purchased.

(33) Not Used (34) FAX MODE

Means the unit received a fax message in the FAX mode

(35) MAN RCV

Means the unit received a fax message by manual operation.

(36) FRN RCV

Means the unit received a fax message by friendly signal detection.

(37) VOX

Means the unit detected silence or no voice.

(38) RMT DTMF

Means the unit detected DTMF (Remote Fax activation code) entered remotely.

(39) PAL DTMF

Means the unit detected DTMF (Remote Fax activation code) entered by a parallel connected telephone.

(40) TURN-ON

Means the unit started to receive after 10 rings. (Remote Turn On: Service Code #573)

(41) TIME OUT

Means the unit started to receive after Ring Time Out in the EXT-TAM or TEL/FAX mode.

(42) IDENT

Means the unit detected Ring Detection.

(43) CNG OGM

Means the unit detected the CNG while it was sending the Dummy Ring Back Tone in the TEL/FAX mode, or while answering a call in the EXT-TAM mode. Or means the unit detected the CNG while it was sending the OGM in the TAM/FAX mode

(44) CNG ICM

Means the unit detected the CNG while it was recording the ICM in the TAM/FAX mode.

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12 Troubleshooting Guide

12.1. Troubleshooting Summary

After confirming the problem by asking the user, troubleshoot according to the instructions and observe the following precautions.

12.1.1. Precautions

1. If there is a problem with the print quality or the paper feed, first check if the installation space and the print paper meets the specifications, the paper selection lever/paper thickness lever is set correctly, and the paper is set correctly without any slack.

2. Before troubleshooting, first check that the connectors and cables are connected correctly (not loose). If the problem occurs randomly, check it very carefully.

3. When connecting the AC power cord with the unit and checking the operation, exercise utmost care when handling electric parts in order to avoid electric shocks and short-circuits.

4. After troubleshooting, double check that you have not forgotten any connectors, left any loose screws, etc.

5. Always test to verify that the unit is working normally.

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KX-FT981LA-B / KX-FT987LA-B

12.2. Error Messages-Display

If the unit detects a problem, one or more of the following messages will appear on the display. The explanations given in the [ ] are for servicemen only. Refer to Translation Lists (P.9) for display.

• There is something wrong with the unit. [This error is displayed when the thermal head does not warm up. Check the thermistor on the thermal head and connector lead.]

• The document was not fed into the unit properly. Re-insert the document. If misfeeding occurs frequently, clean the document feeder rollers and try again. (Refer to Document Feeder/Scanner Glass Cleaning (P.149).)

• Attempted to send a document longer than 600 mm. Press [STOP] to remove the document. Divide the document into two or more sheets and try again. [Alternately, turn off service code #559 to enable sending of documents longer than 600 mm] (Refer to Service Function Tab le (P.59).)

• The cover is open. Close it and press [FAX/START] to clear the message.

• The unit has run out of recording paper. Install recording paper and press [FAX/START] to clear the message.

• Your TAM/FAX greeting message is not recorded. Record a message.

• The voice guidance feature is set to off. Activate feature #47 on Program Mode Table (P.93). Prerecorded greeting message will be adopted.

• There is something wrong with the unit’s modem. [Refer to #554 on Test Mode (P.54) and check the Digital board section. (Digital Board Section (P.106).)]

• The other party’s fax machine is busy or has run out of recording paper. Try again.

• A recording paper jam occurred. Clear the jammed paper. (Refer to Recording Paper Jams (P.148).)

Make sure the paper stacker is inserted (KX-FT987 only).

• The unit has a document in memory. See the other displayed message instructions to print out the document. For fax memory capacity, see Specifications (P.8).

• The memory is full of received documents due to lack of recording paper or a recording paper jam. Install paper or clear the jammed paper. (Refer to Recording Paper Jams (P.148.)

• When performing broadcast transmission, the document being stored exceeded the memory capacity of the unit. Send the entire document manually.

• There is no space to store new items in the phonebook. Erase unnecessary items.

• The unit is checking and initializing the paper cutter. Wait for a moment while the check is completed.

• The greeting message or memo message you recorded was under 1 second long. Record a longer message.

• The other party’s fax machine is busy or has run out of recording paper. Try again.

The document is jammed. Remove the jammed document. (Refer to Document Jams Sending (P.149).)

• Press [STOP] to eject the jammed document.

• A transmission error occurred. Try again.

Page 69

• The unit is too hot. Stop using the unit for a while and let the unit cool down.

• There is no memory available to record voice messages. Erase unnecessary messages.

KX-FT981LA-B / KX-FT987LA-B

Page 70

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12.3. Error Messages-Report

12.3.1. Journal Report

If a problem occurs during fax transmission or reception, one of the following messages will be printed on the sending and journal reports.

How to output the Journal Report

1. Press [MENU] repeatedly until “ PRINT REPORT ” is displayed.

2. Press [] or [] repeatedly to display “ JOURNAL REPORT ”.

3. Press [SET].

4. The report is printed out.

Error code table:

(1) CODE (2) RESULT (3) MODE SYMPTOM Counter-

measure* PRESSED THE STOP KEY SND & RCV Communication was interrupted by the STOP button. DOCUMENT JAMMED SND The document paper is jammed. NO DOCUMENT SND No document paper. OTHER FAX NOT RESPONDING SND Transmission is finished when the T1 TIMER expires. 1

28 COMMUNICATION ERROR SND & RCV --------------41 COMMUNICATION ERROR SND DCN is received after DCS transmission. 2 42 COMMUNICATION ERROR SND FTT is received after transmission of a 2400BPS training signal. 3 43 COMMUNICATION ERROR SND No response after post message is transmitted three times. 4 44 COMMUNICATION ERROR SND RTN and PIN are received. 5 46 COMMUNICATION ERROR RCV No response after FTT is transmitted. 6 48 COMMUNICATION ERROR RCV No post message. 7 49 COMMUNICATION ERROR RCV RTN is transmitted. 8 50 COMMUNICATION ERROR RCV PIN is transmitted (to PRI-Q). 8 51 COMMUNICATION ERROR RCV PIN is transmitted. 8

OTHER FAX NOT RESPONDING RCV Reception is finished when the T1 TIMER expires. 9

54 ERROR-NOT YOUR UNIT RCV DCN is received after DIS transmission. 11 58 COMMUNICATION ERROR RCV DCN is received after FTT transmission. 13 59 ERROR-NOT YOUR UNIT SND DCN responds to the post message. 14 65 COMMUNICATION ERROR SND DCN is received before DIS reception. 2 65 COMMUNICATION ERROR RCV Reception is not EOP, EOM PIP, PIN, RTP or RTN. 2 68 COMMUNICATION ERROR RCV No response at the other party after MCF or CFR is transmitted. 13 70 ERROR-NOT YOUR UNIT RCV DCN is received after CFR transmission. 13 72 COMMUNICATION ERROR RCV Carrier is cut when the image signal is received. 16

MEMORY FULL RCV The document was not received due to memory full. JUNK FAX PROH. REJECT RCV The fax was rejected by the junk fax prohibitor feature. CANCELLED SND The multi-station transmission was reject by the user.

FF COMMUNICATION ERROR SND & RCV Modem error. For the DCN, DCN, etc. abbreviations, refer to Modem

Section (P.30).

SND=TRANSMISSION RCV=RECEPTION

Most fax communication problems can be resolved by the following steps.

1. Change the transmit level. (Service code: 596, refer to Service Function Table (P.59).)

2. Change the TX speed/RX speed. (Service code: 717/718, refer to Service Function Table (P.59).)

Note*:

• If the problem remains, see the following "Countermeasure" flow chart.

• Refer to Translation Lists (P.9) for report.

Page 71

Countermeasure

KX-FT981LA-B / KX-FT987LA-B

Page 72

KX-FT981LA-B / KX-FT987LA-B

REFERENCE:

Test Mode (P.54)

Page 73

KX-FT981LA-B / KX-FT987LA-B

REFERENCE:

Test Mode (P.54)

Page 74

KX-FT981LA-B / KX-FT987LA-B

REFERENCE:

Test Mode (P.54)

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KX-FT981LA-B / KX-FT987LA-B

REFERENCE:

Test Mode (P.54)

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Page 77

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Page 78

KX-FT981LA-B / KX-FT987LA-B

REFERENCE:

Test Mode (P.54)

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12.3.2. Special Service Journal Report

Journal 2 and Journal 3 shown below, which are special journals giving the additional detailed information about the latest 35 communications, can be printed by Service Code 881 or 882. Remote printing function for the journal reports (JOURNAL, JOURNAL 2 and JOURNAL 3) is also available for service technicians. (Refer to Remote Programming (P.92).) The JOURNAL report only gives you basic information about a communication, but the other two journal reports provide different information on the same item (communication).

HOW TO READ JOURNAL REPORTS:

Example:

1. Look at NO. 01 in the JOURNAL. If you want to know about the details about that item, see NO. 01 in the JOURNAL 2 and the JOURNAL 3. You can get the following information. * MODE: Fax transmission * RCV. MODE: TEL * TX SPEED: 9.6 kbps * RESOLUTION: standard * ENCODE: MH * MAKER CODE: 79

2. Look at NO. 04 in the JOURNAL 2. CNG (0003) indicates that the CNG signal has been received three times since the pur- chase date.

For further details, see Journal 2 (P.80) and Journal 3 (P.81).

Page 80

KX-FT981LA-B / KX-FT987LA-B

12.3.2.1. Journal 2

Refer to JOURNAL 2 in Printout Example (P.81). Journal 2 displays the additional detailed information about the last 35 communications.

Descriptions: (1) RCV. MODE

Indicates which receive mode the unit was in when the unit received a fax message. This information is also displayed when the unit transmitted a fax message.

(2) SPEED

Indicates the speed of the communication. If multiple pages are transmitted or received, it indicates the last page’s communication speed. If there is a communication error, "?" is displayed.

(3) RESOLUTION

Indicates the resolution of the communication. If multiple pages are transmitted or received, it indicates the last page’s resolution. If there is a communication error, "?" is displayed.

(4) RCV-TRIG. (CNT.)

Indicates the trigger that causes the unit to switch to the fax receive mode. The available options are listed in JOURNAL 2 in Printout Example (P.81). The values in parentheses indicate how many times the trigger has been used. (For example, "0003" means three times.)

No. Display Function

1 FAX MODE Means the unit received a fax message in the FAX mode.

2 MAN RCV Means the unit received a fax message by manual operation.

3 FRN RCV Means the unit received a fax message by friendly signal detection.

4 VOX Means the unit detected silence or no voice.

5 RMT DTMF Means the unit detected DTMF (Remote Fax activation code) entered remotely.

6 PAL DTMF Means the unit detected DTMF (Remote Fax activation code) entered by a parallel connected tele-

phone.

7 TURN-ON Means the unit started to receive after 10 rings. (Remote Turn On: Service Code #573)

8 TIME OUT Means the unit started to receive after Ring Time Out in the EXT-TAM or TEL/FAX mode.

9 IDENT Means the unit detected Ring Detection.

10 CNG OGM Means the unit detected the CNG while it was sending the Dummy Ring Back Tone in the TEL/FAX

mode. OR Means the unit detected the CNG while it was sending the OGM in the ANS/FAX mode.

11 CNG ICM Means the unit detected the CNG while it was recording the ICM in the ANS/FAX mode.

(5) ERROR→MEMORY

Indicates the reason why the unit received a fax message in memory. If you look at No.11 in the JOURNAL 2 in Printout Example (P.81), it shows the fax message was received in memory due to "PAPER OUT" error.

NO RESPONSE DISAPPEARED ON JOURNAL

The "NO RESPONSE DISAPPEARED ON JOURNAL" displays the information about the last 10 communications terminated by "No Response". (Some of the communications terminated by "No Response" were not displayed in the JOURNAL.) When a fax transmission cannot be performed because the other party’s unit is set to the TEL mode, "No response" will be

printed.

Page 81

12.3.2.2. Journal 3

Refer to JOURNAL 3 in Printout Example (P.81).

Descriptions: (6) ENCODE

Compression Code: MH/MR/MMR

(7) MSLT

MSLT means Minimum Scan Line Time. Used only at the factory.

(8) EQM

EQM means Eye Quality Monitor. Used only at the factory.

12.3.2.3. Printout Example

KX-FT981LA-B / KX-FT987LA-B

(9) ERROR LINE(RX)

When an error occurs while receiving a fax, this shows the number of error lines.

(10) MAKER CODE

This shows a 2 digit code of the other party's fax machine brand.

0E: "KX" model 00: Unknown 79: "UF" model 19: "Xerox" model

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Page 83

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12.3.3. Communication Section

Find the problem in the table shown below, and refer to the corresponding troubleshooting procedure in Defective Facsimile Section (P.84).

No. Symptom Reference Content Possible cause

1 The paper is not fed properly when faxing.

(Not in the copy mode.)

2 The fax usually transmits successfully but sometimes fails.

(The unit can copy documents.)

Transmit Problem (P.84) Problem with the feeding mecha-

nism. Refer to ADF (Auto Document

Feed) Section (P.98).

Sometime there is a transmit problem

(P.85)

Problem with the service line or with the receiver's fax.

3 The fax usually receives successfully but sometimes fails.

(The unit can copy documents.)

4 The fax completely fails to transmit or receive.

(The unit can copy documents.)

5 The fax fails either to transmit or receive when making a

long distance or an international call. (The unit can copy documents.)

6 The fax image is poor when transmitting or receiving dur-

ing a long distance or an international call.

7 No.1~No.5 • The troubleshooting procedure for each

Receive Problem (P.86) Problem with the service line or with

The unit can copy, but cannot transmit/ receive (P.87)

The unit can copy, but cannot either transmit/receive long distance or international communications (P.88)

The unit can copy, but the transmission and reception image are incorrect (P.90)

error code will be printed on the communication result report.

• Error Messages-Report (P.70)

the transmitter's fax.

Problem with the electric circuit.

Problem with the service line.

Page 84

KX-FT981LA-B / KX-FT987LA-B

12.3.3.1. Defective Facsimile Section

12.3.3.1.1. Transmit Problem

REFERENCE:

(*1): Operation Panel Section (P.122) (*2): ADF (Auto Document Feed) Section (P.98) (*3): Maintenance (P.140) (*4): How to Remove the Gear Block and Separation Roller (P.134) (*5): How to Remove the Operation Board, LCD and Platen Roller (P.136) (*6): Refer to Translation Lists (P.9) for display.

Page 85

12.3.3.1.2. Sometime there is a transmit problem

KX-FT981LA-B / KX-FT987LA-B

Note:

• "596: Transmit level set" represents a service code. (Refer to Service Function Table (P.59).)

• (*1): Refer to Translation Lists (P.9) for display.

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KX-FT981LA-B / KX-FT987LA-B

12.3.3.1.3. Receive Problem

First confirm whether the recording paper is installed properly or not before starting troubleshooting. (Refer to "Remarks".)

Note:

"596: Transmit level set" represents a service code. (Refer to Service Function Table(P.59).)

Remarks:

Regarding the reception problem, we have investigated the conceivable causes in the flow chart except for the software-related errors. However, some troubles may occur due to the software-related problems such as "CHECK PAPER" when the fax switches to the memory receiving mode and the memory capacity becomes full of the unprintable data. In this case, error messages [FAX MEMORY FULL] and its main cause, for example "CHECK PAPER" are displayed on the LCD. Once you solve the main problem, [FAX MEMORY FULL] will be cancelled and the reception problem will be resolved. LCD display messages indicating the error causes are shown below. COVER OPEN UNIT OVERHEATED (COVER OPEN, etc.)...Reset the unit. PAPER JAMMED Please refer to Error Messages-Display (P.68) for the above items. If it turns out to be a hardware deformity, please check each sensor. (Refer to Te s t M o d e (P.54).)

Page 87

12.3.3.1.4. The unit can copy, but cannot transmit/receive

KX-FT981LA-B / KX-FT987LA-B

REFERENCE:

(*1): Tes t M o d e (P.54) (*2): Analog Board Section (P.114)

Page 88

KX-FT981LA-B / KX-FT987LA-B

12.3.3.1.5. The unit can copy, but cannot either transmit/receive long distance or international communications

The following two causes can be considered for this symptom.

Cause 1:

The other party is executing automatic dialing, the call has been received by this unit, and the CED or DIS signal response time is too long. (In most cases, this unit detects the CNG signal and can respond to CED or DIS.) (According to the ITU-T standard, the communication procedure is cancelled when there is no response from the other party within 35 sec, so that the other party releases the line.)

(Cause and Countermeasure)

As shown in the chart above, the total handshaking time must be reduced, but because of the long distance connection and linking of several stations, the line connection time cannot be reduced. Accordingly, the following countermeasures should be tried. (A)... As the 45 sec. count is started directly after dialing or directly after the START button has been pressed for models with a START button, the other party should be called manually, if possible. Another possibility is entering two pauses at the end of the auto dial number on the transmission side. Then the count start time can be delayed for 2 pauses (about 10 sec.).

Cause 2:

Erroneous detection because of an echo or an echo canceler.

(Echo/Echo Canceler)

The signal from FAX1 reaches FAX2 via stations 1 and 2, but the reflection signal at station 2 also returns via station 1 (echo). As the distance between station 1 and station 2 is far, the echo returns to FAX 1 at a max of 600 msec after transmission. There is a possibility that this signal is detected erroneously as the signal from FAX2. For a normal call, there is also a possibility that the echo of their own voice will make the call difficult to understand. For this reason, each station (station 1 and station 2) attaches echo cancelers (S1 and S2) for international lines or long distance lines. For the echo canceler, the level of the transmission signal from FAX 1 is compared with the level of the reception signal from FAX2. When the transmission signal is larger, S1 is closed while S2 is opened when it is smaller. In other words, for transmission from FAX1, S1 is closed and S2 is open, so that the echo does not return to FAX1.

Page 89

KX-FT981LA-B / KX-FT987LA-B

(Causes and Countermeasures)

No. Countermeasure Side Echo Communication Problem Example Countermeasure Service Code

1 Sending side Some time is needed to compare the level

of the receiving and sending signals for the echo canceler. The header of the training signal lacks due to a switching delay to close S1.

2 Receiving side The echo canceler function stops according

Receiving side Change the regular rime of 75 msec

Sending side The sending side FAX sends a DCS

3 Sending side Communication failure occurs in a long dis-

4 Sending side

Receiving side

5 Sending side

Receiving side

to a CED signal frequency of 2100Hz (S1 and S2 are both ON), a DIS signal is returned as an echo, and a DCS signal from the sending side overlaps the DIS echo. Then the receiving side FAX cannot retrieve the DCS signal. (Refer to Fig. a)

tance communication on the telephone line without an echo canceler.

There are some cases (e.g. Mobil comms.) which cause the collision of TX / RX signals due to the delay / echo and noise of the network / terminal. (Refer to Fig. e)

Add a dummy signal to the beginning of the training signal.

Change to a 1100Hz CED signal frequency. (Refer to Fig. b)

between the CED signal and DIS signal to 500 msec. This will give at least 250 msec to recover the echo canceler operation. (Refer to Fig. c)

signal not after receiving the 1st DIS signal but after receiving the 2nd DIS signal. (Refer to Fig. d) Decrease the transmission level from 9 dBm to -15 dBm and the echo level will decrease. Decrease the receiving sensitivity from

-13 dBm to about -32 dBm so an echo signal will not received. Set additional Pause time (Service mode: code No. 774) in between the original and its repeated signals, to prevent the collision of the signals at both end.

Service code (521) (International mode select) This countermeasure becomes the default value.

Service code (520) (CED frequency select) Service code (593) (Time between CED and 300 bps)

Service code (594) (Overseas DIS detection select)

Service code (596) (Transmit level set)

Service code (598) (Receiving sensitivity)

Service code (774) (T4 timer)

Fig. a

(Overlapping the Echo of the DIS signal and DCS signal)

Fig. b

(Countermeasure by Changing the CED Frequency)

Page 90

KX-FT981LA-B / KX-FT987LA-B

Fig. c

(Countermeasure by Changing the Interval Between CED and DIS)

2nd / 3rd DCS / Training & delayed CFR / FTT at TX side

2nd / 3rd EOP / EOM / MPS & delayed MCF / PIP / PIN / RTP / RTN at TX side

delayed DCS & 2nd / 3rd / --- DIS at RX side

Fig. d

(Countermeasure by Ignoring the 1st DIS)

(Fig. e)

12.3.3.1.6. The unit can copy, but the transmission and reception image are incorrect

(Long distance or international communication operation)

This symptom highly depends on the transmission and reception capability of the other FAX unit and the line conditions. The countermeasures for this unit are shown below.

Transmission Operation:

Set the transmitting speed to 4800BPS (service mode: code No. 717) or select the overseas mode.

Reception Operation:

If 80% or more of the reception is incorrect, set the receiving speed to 4800BPS. (Service mode: code No. 718)

• Refer to Service Function Table (P.59).

Page 91

12.3.3.1.7. How to record fax signal by using PC

Recording FAX signal is one of the useful analysis measures to solve communication problems. The way of recording easily by using PC is shown as follows.

1. Equipment

• 1 jig

• 1 PC (with LINE IN)

• 1 audio cord (mini jack supported)

• 2 tel cords

2. Setting up

Parts No. Parts Name & Descrip-

PQJJ1T004Z JACK1, JACK2 2 PQJJ1D010Z PIN JACK 1 ECQE2155KF or ECQE2E155KC MA4020 DIODE 2

KX-FT981LA-B / KX-FT987LA-B

Qt’y

tion

CAPACITOR 2

FAX SIGNAL RECORDING JIG

3. Connecting PC and JIG

4. PC setting and recording

1. Set LINE IN to be valid in the volume control setting. Refer to the PC instruction book.

2. Start up the PC software “SOUND RECORDER”. (This software is bundled to Windows OS, which can create WAV file.) Set the audio format “PCM 22.050kHz, 8bit, mono”.

3. Click the record button and start recording after acquisition the signal.

Note:

• Not to be wind wave patterns on the wave monitor.

• Please compress the recording data when you send attaching to E-Mail because the data size will be so heavy.

• Any software which can create WAV files is available.

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KX-FT981LA-B / KX-FT987LA-B

12.4. Remote Programming

If, after the call is connected, the customer describes the situation and it is determined that the problem can be corrected by making parameter changes, this function makes it possible to change parameters such as the user code and service code from another fax (using DTMF tones). Therefore, travel to the customer's location is not required. However, it is not possible to change all the parameters remotely (Program Mode Table (P.93)). The function used to accomplish this is remote program- ming.

First, in order to check the current status of the service code parameter, print out the setup list (code: 991) and the service list (code: 999) from the customer's fax machine. Based on this, the parameters for the desired codes can be changed. The procedure for changing and listing parameters is described on Entering the Remote Programming Mode and Changing Service Codes (P.92). Also, before exiting the remote programming mode, it is advisable to obtain a new list to confirm that the changes were made correctly.

Hint:

Since the connected telephone is in use during the remote programming mode, it may be helpful to ask the customer to switch to the speakerphone. This frees the customer from the need to remain right next to the fax while you are making parameter settings. When finished, inform the customer. Also note that in very noisy locations where the DTMF tones are not audible, the remote programming function will not work.

12.4.1. Entering the Remote Programming Mode and Changing Service Codes

REFERENCE:

(*1): Program Mode Table (P.93)

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12.4.2. Program Mode Table

Code Function Set Value Default Remote Set-

001 Date and time dd/mm/yy hh:mm 01/01/08 NG

002 Your logo --------- None NG

003 Your FAX number --------- None NG

004 Sending report 1: ERROR / 2: ON / 3: OFF ERROR OK

006 FAX ring count 1 ~ 9 2 OK

TAM ring count (KX-FT987 only) 0: Tall Saver / 2~7 2 OK

010 Recording time (KX-FT987 only) 1: GREETING ONLY / 2: 1 minute /

3: 2 minutes / 4: 3 minutes

011 Remote TAM ID (KX-FT987 only) --------- --------- NG

013 Dialing mode 1: PULSE / 2: TONE TONE OK

017 Ringer tone TONE1 / TONE2 / TONE3 TONE1 NG

022 Automatic journal report 1: ON / 2: OFF ON OK

023 Overseas mode 1: NEXT FAX / 2: ERROR / 3: OFF ERROR OK

025 Delayed transmission ON / OFF OFF NG

026 Auto CALLER ID list 1: ON / 2: OFF OFF OK

031 Distinctive ring 1:OFF / 2:ON OFF OK

032 Fax ring pattern 1: B-D / 2: A / 3: B / 4: C / 5: D B-D OK

036 Receiving reduction 1: ON / 4: OFF ON OK

039 Display contrast NORMAL / DARKER NORMAL NG

041 FAX activation code ON / OFF

044 Memory receive alert 1: ON / 2: OFF ON OK

046 Friendly reception 1: ON / 2: OFF ON OK

047 Voice guidance (KX-FT987 only) 1:ON / 2:OFF ON OK

048 Language 1: English / 2: Spanish / 3:Portuguese Spanish OK

049 Auto disconnection 0: OFF / 1: ON

050 Voice prompt (KX-FT987 only) 1: Portuguese / 2: Spanish Spanish OK

054 Common greeting MSG. REC. time

(KX-FT987 only)

058 Scan contrast 1: NORMAL / 2: DARKER / 3: LIGHT NORMAL OK

059 Print contrast 1: NORMAL / 2: DARKER NORMAL OK

067 ICM monitor (KX-FT987 only) 1: ON / 2: OFF ON OK

072 Recall/Flash time 1:90 / 2:100 / 3:110 / 4:160 / 5:200 / 6:250 /

073 Manual receive mode 1: TEL / 2: TEL/FAX TEL OK

076 Connecting tone 1: ON / 2: OFF ON OK

077 Auto answer mode (KX-FT987 only) 2: FAX only / 3: TAM/FAX TAM/FAX OK

078 TEL/FAX ring setting 1 ~ 9 2 OK

080 Set default YES / NO NO NG

501 Pause time 001 ~ 600 × 100 msec 030 × 100 msec OK

503 Dial speed select 1: 10 pps / 2: 20 pps 10 pps OK

510 Vox time (KX-FT987 only) 1: 6 sec / 2: 4 sec 6 sec OK

511 Vox Sensitivity (KX-FT987 only) 1: High / 2: Low High OK

512 Vox mode detection (KX-FT987 only) 1: A / 2: B A OK

514 Bell detection time 1 ~ 9 × 100 msec 6 × 100 msec OK

520 CED frequency select 1: 2100 Hz / 2: 1100 Hz 2100 Hz OK

521 International mode select 1: ON / 2: OFF ON OK

522 Auto standby select 1: ON / 2: OFF ON OK

523 Receive equalizer select 1: 0 km / 2: 1.8 km / 3: 3.6 km / 4: 7.2 km 0 km OK

524 Transmission equalizer select 1: 0 km / 2: 1.8 km / 3: 3.6 km / 4: 7.2 km 0 km OK

544 Document feed position 1 ~ 9 mm 5 mm OK

550 Memory clear --------- --------- NG

551 Flash memory check --------- --------- NG

552 DTMF signal tone test 1: ON / 2: OFF OFF OK

553 Monitor on FAX communication select 1: OFF / 2: Phase B / 3: ALL OFF OK

554 Modem test --------- --------- NG

555 Scan test --------- --------- NG

1: 16 sec / 2: 60 sec 16 sec OK

7:300 / 8:400 / 9:600 / 0:80 / 10:700 / 11:900

3 minutes OK

ON ID= #9

ON CODE= 0

700 ms OK

ting

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KX-FT981LA-B / KX-FT987LA-B

Code Function Set Value Default Remote Set-

556 Motor test --------- --------- NG

557 LED test --------- --------- NG

558 LCD test --------- --------- NG

559 Document jam detection select 1: ON / 2: OFF ON OK

560 Cutter selection (KX-FT987 only) 1: ON / 2: OFF ON OK

561 Key test --------- --------- NG

562 Cutter test (KX-FT987 only) --------- --------- NG

567 T0 timer 001 ~ 255 sec 046 sec OK

570 Break % select 1: 61% / 2: 67% 61% OK

571 ITS auto redial time set 00 ~ 99 00 OK

572 ITS auto redial line disconnection time set 001 ~ 999 sec 065 sec OK

573 Remote turn-on ring number set 00 ~ 99 10 OK

580 TAM continuous tone detection (KX-FT987 only) 1: ON / 2: OFF ON OK

590 FAX auto redial time set 00 ~ 99 02 OK

591 FAX auto redial line disconnection time set 001 ~ 999 sec 065 sec OK

592 CNG transmit select 1: OFF / 2: ALL / 3: AUTO ALL OK

593 Time between CED and 300 bps 1: 75 msec / 2: 500 msec / 3: 1 sec 75 msec OK

594 Overseas DIS detection select 1: 1st / 2: 2nd 1st OK

595 Receive error limit value set 1: 5% / 2: 10% / 3: 15% / 4: 20% 10% OK

596 Transmit level set 00 ~ 15 × -1 dBm 11 × -1 dBm OK

Receiving Sensitivity 20 ~ 48 × -1 dBm 42 × -1 dBm OK

598

710 Memory clear except History data --------- --------- NG

717 Transmit speed select 1: 9600 / 2: 7200/ 3: 4800 / 4: 2400 bps 9600 bps OK

718 Receive speed select 1: 9600 / 2: 7200/ 3: 4800 / 4: 2400 bps 9600 bps OK

722 Redial tone detect 1: ON / 2: OFF OFF OK

763 CNG detect time for friendly reception 1: 10 sec / 2: 20 sec / 3: 30 sec 30 sec OK

773 DIS-DCS interval 1: 500 msec / 2: 200 msec 200 ms OK

774 T4 timer 00~99 × 100 msec 00 × 100 ms OK

784 Voice Prompt Test (KX-FT987 only) --------- --------- NG

815

Sensor test & Vox test

841 Digital SP-Phone RX & TX check (KX-FT987 only) --------- --------- NG

845 Setting scanning density 00 ~ 32 08 OK

852 Print test pattern --------- --------- NG

853 Top margin 1 ~ 9 mm 5 mm OK

874 DTMF ON time 06 ~ 20 × 10msec 10 × 10 msec OK

875 DTMF OFF time 06 ~ 20 × 10msec 10 × 10 msec OK

880 History list --------- --------- NG

881 Journal 2 --------- --------- NG

882 Journal 3 --------- --------- NG

961 The time transmitting the false ring back tone 01~10 sec 07 sec OK

962 The operator calling time 05~30 sec 10 sec OK

991 Setup list 1: Start --------- OK

994 Journal list 1: Start --------- OK

995 Journal 2 list 1: Start --------- OK

996 Journal 3 list 1: Start --------- OK

998 History list 1: Start --------- OK

999 Service list 1: Start --------- OK

--------- --------- NG

OK means "can set". NG means "can not set".

ting

Note:

•

Power is OFF/ON after changing this set value.

•*2 Vox test is available for KX-FT987 only.

• Refer to Service Function Table (P.59) for descriptions of the individual codes.

Example:

If you want to set value in the "004 Sending report", press the dial key number 1, 2 or 3 corresponding to the Set Value you want to select. (1:ERROR/2:ON/3:OFF)

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KX-FT981LA-B / KX-FT987LA-B

12.5. Troubleshooting Details

12.5.1. Outline

Troubleshooting is for recovering quality and reliability by determining the broken component and replacing, adjusting or cleaning it as required. First, determine the problem then decide the troubleshooting method. If you have difficulty finding the broken part, determine which board is broken. (For example: the Digital PCB, Analog PCB, etc.) The claim tag from a customer or dealer may use different expressions for the same problem, as they are not a technician or engineer. Using your experience, test the problem area corresponding to the claim. Also, returns from a customer or dealer often have a claim tag. For these cases as well, you need to determine the problem. Test the unit using the simple check list on Simple Check List (P.96). Difficult problems may be hard to determine, so repeated testing is necessary.

12.5.2. Starting Troubleshooting

Determine the symptom and the troubleshooting method.

REFERENCE:

(*1): Error Messages-Display (P.68) (*2): Simple Check List (P.96) (*3): Power Supply Board Section (P.119) (*4): Digital Board Section (P.106)

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KX-FT981LA-B / KX-FT987LA-B

12.5.3. Troubleshooting Items

ITEM SYMPTOM REFERENCE

ADF (Auto Document Feeder)

Printing Skewed receiving image. See Skewed Receiving Image (P.103)

Communication FAX, TEL

(Analog board) Error code is displayed. See Error Messages-Display (P.68)

Abnormal mechanical sound Abnormal sound from the product See When Coping or Printing, an Abnormal Sound is

Power supply Voltage output is abnormal. See Power Supply Board Section (P.119)

Operation panel Keys are not accepted. See Operation Panel Section (P.122)

Sensor If the electric circuit is the cause, the error mes-

No feed See No Document Feed (P.98)

Paper jam See Document Jam (P.99)

Multiple feed See Multiple Feed (P.100)

Skew See Skew (P.101)

Image is distorted. See Image is Distorted (When printing) (P.102)

Black or white vertical lines appear See Black or White Vertical Lines Appear (P.103)

Cannot communicate by fax. See Defective ITS (Integrated Telephone System) Section

(P.116) and Error Messages-Report (P.70).

Cannot talk. See Analog Board Section (P.114)

DTMF tone doesn’t work.

Handset/Monitor sound, volume.

Heard from the Unit (P.104)

See Sensor Section (P.123) sage corresponding to the sensor will be displayed.

12.5.3.1. Simple Check List

SERIAL NO. DATE

FUNCTION JUDGEMENT REFERENCE

FAX operation Transmission OK / NG

Receiving OK / NG

Copy operation FINE mode OK / NG

PHOTO mode OK / NG

Telephone operation Handset MIC/receiver OK / NG

Monitor or SP-Phone sound OK / NG

Ringer sound OK / NG

Dial operation OK / NG

Volume operation OK / NG

Vox detection (KX-FT987 only) OK / NG Service code #815

Operation Panel Key check OK / NG Service code #561

LED check OK / NG Service code #557

LCD check OK / NG Service code #558

Sensor Sensor check OK / NG Service code #815

Clock Time goes by OK / NG Is the time kept correctly?

(Refer to Test Mode (P.54).)

Check with another clock.

Page 97

Digital TAM (KX-FT987 only)

KX-FT981LA-B / KX-FT987LA-B

SERIAL NO. DATE

FUNCTION JUDGEMENT REFERENCE

Greeting REC / PLAY OK / NG

Incoming message REC / PLAY OK / NG

Memo REC / PLAY OK / NG

Voice prompt (KX-FT987 only)

External Telephone Handset transceiver/receiver OK / NG

Remote control OK / NG

OK / NG Service code #784

Note:

• Check according to the service code referring to the Tes t Mo de (P.54).

(Refer to Test Mode (P.54).) Check whether voice prompt is play or not.

Change to FAX receiving by pressing [ ][#][9]. (default fax activation code) (Refer to #041 on Program Mode Table (P.93).)

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KX-FT981LA-B / KX-FT987LA-B

12.5.4. ADF (Auto Document Feed) Section

12.5.4.1. No Document Feed

REFERENCE:

(*1): Multiple Feed (P.100) (*2): How to Remove the Operation Board, LCD and Platen Roller (P.136) (*3): Test Mode (P.54) (*4): Digital Board Section (P.106) (*5): Sensor Section (P.123) (*6): How to Remove the Gear Block and Separation Roller (P.134) (*7): How to Remove the Separation Rubber Flap (P.137) (*8): Power Supply Board Section (P.119)

Page 99

12.5.4.2. Document Jam

KX-FT981LA-B / KX-FT987LA-B

REFERENCE:

(*1): Tes t M o d e (P.54) (*2): Sensor Section (P.123) (*3): How to Remove the Operation Board, LCD and Platen Roller (P.136) (*4): Disassembly and Assembly Instructions (P.128)

Page 100

KX-FT981LA-B / KX-FT987LA-B

12.5.4.3. Multiple Feed

REFERENCE:

(*1): How to Remove the Separation Rubber Flap (P.137) (*2): Disassembly and Assembly Instructions (P.128) (*3): Maintenance (P.140)

100